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2025-07-14 02:38:35
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---|---|---|---|---|---|---|---|---|---|---|---|---|
A385488 | Decimal expansion of the surface area of a gyroelongated pentagonal birotunda with unit edge. | [
"3",
"7",
"9",
"6",
"6",
"2",
"3",
"6",
"8",
"8",
"2",
"7",
"5",
"6",
"3",
"7",
"6",
"0",
"0",
"8",
"3",
"8",
"2",
"6",
"0",
"7",
"1",
"4",
"3",
"7",
"2",
"2",
"0",
"3",
"8",
"8",
"6",
"2",
"3",
"1",
"6",
"5",
"4",
"2",
"5",
"7",
"8",
"2",
"2",
"6",
"1",
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"6",
"2",
"3",
"1",
"0",
"4",
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"6",
"2",
"7",
"8",
"8",
"0",
"5",
"7",
"5",
"8",
"0",
"7",
"5",
"5",
"9",
"5",
"5",
"9",
"5",
"1",
"4",
"6",
"8",
"0",
"0",
"7",
"5",
"6",
"7"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 6 | 2 | 1 | [
"A002163",
"A002194",
"A384284",
"A385261",
"A385263",
"A385264",
"A385488"
]
| null | Paolo Xausa, Jun 30 2025 | 2025-07-03T01:16:48 | oeisdata/seq/A385/A385488.seq | 92da5c4bd0f30cca3defe6ab5a3ea241 |
A385489 | Positive integers m such that every Gaussian integer g with |g| <= m is a linear combination of the distinct Gaussian divisors of m. | [
"1",
"2",
"3",
"4",
"5",
"6",
"8",
"9",
"10",
"12",
"13",
"14",
"15",
"16",
"18",
"20",
"21",
"24",
"25",
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"32",
"34",
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"84",
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"88",
"90",
"91",
"95",
"96",
"98",
"99",
"100"
]
| [
"nonn",
"new"
]
| 12 | 1 | 2 | [
"A005153",
"A363227",
"A385489"
]
| null | Frank M Jackson, Jun 30 2025 | 2025-07-04T20:02:15 | oeisdata/seq/A385/A385489.seq | 68e488765de5104d6a75e617c2643f93 |
A385490 | Least integer k such that the sum of its anti-divisors is equal to k - n. | [
"5",
"1",
"2",
"261",
"34",
"29",
"194",
"7611",
"216",
"51",
"1164",
"1251",
"1044",
"239",
"236",
"69",
"226",
"749",
"64",
"1079",
"156",
"79",
"114",
"219",
"2546",
"89",
"254",
"879",
"106",
"541",
"344",
"1619",
"96",
"531",
"454",
"991",
"293606",
"10879",
"134",
"141",
"1006",
"491",
"146",
"509",
"1214",
"639",
"366",
"13649",
"35856",
"17081",
"726"
]
| [
"nonn",
"easy",
"new"
]
| 5 | 0 | 1 | [
"A066417",
"A385451",
"A385490"
]
| null | Paolo P. Lava, Jun 30 2025 | 2025-07-04T19:49:47 | oeisdata/seq/A385/A385490.seq | 5ae340895e240a457503f37e13fc0fa7 |
A385491 | Period 8: repeat [1, 8, 4, 3, 6, 5, 7, 2]. | [
"1",
"8",
"4",
"3",
"6",
"5",
"7",
"2",
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"8",
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"3",
"6",
"5",
"7",
"2"
]
| [
"nonn",
"easy",
"new"
]
| 38 | 0 | 2 | [
"A003833",
"A069892",
"A385491",
"A385634"
]
| null | Christopher W Moriarty, Jun 30 2025 | 2025-07-12T21:33:06 | oeisdata/seq/A385/A385491.seq | 60728304a2159ac0263c029a34b14d8a |
A385492 | Numbers y such that there exists an integer 0 < x < y such that x^sigma(x) * y^sigma(y) = (x*y)^(x+y). | [
"2",
"3",
"5",
"7",
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"223",
"227",
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"239",
"241",
"251",
"257",
"263",
"269",
"271",
"277",
"281",
"283",
"284",
"293",
"307",
"311",
"313"
]
| [
"nonn",
"new"
]
| 21 | 1 | 1 | [
"A000040",
"A000203",
"A002046",
"A385186",
"A385492"
]
| null | S. I. Dimitrov, Jun 30 2025 | 2025-07-07T16:07:29 | oeisdata/seq/A385/A385492.seq | 9988d76d9b0285e6d7eab8485bfda353 |
A385495 | Most significant nonzero decimal digit of zeta(n)-1, where zeta(n) = Sum_{j >= 1} 1/j^n is the Riemann zeta function. | [
"6",
"2",
"8",
"3",
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"1",
"6",
"3"
]
| [
"nonn",
"easy",
"base",
"new"
]
| 11 | 2 | 1 | [
"A000027",
"A013662",
"A085541",
"A085548",
"A085964",
"A085969",
"A111395",
"A385431",
"A385495"
]
| null | Marco Ripà, Jun 30 2025 | 2025-07-05T16:13:58 | oeisdata/seq/A385/A385495.seq | 857e6355cc54a236c0349e558c7b7fed |
A385496 | Decimal expansion of 1 - exp(1/2)/2. | [
"1",
"7",
"5",
"6",
"3",
"9",
"3",
"6",
"4",
"6",
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"8",
"4",
"9",
"8",
"5",
"6",
"6"
]
| [
"nonn",
"cons",
"new"
]
| 17 | 0 | 2 | [
"A019775",
"A385496"
]
| null | Artur Jasinski, Jun 30 2025 | 2025-07-06T17:33:18 | oeisdata/seq/A385/A385496.seq | 6ae3027f7b48df75d8fae1341a3c9da1 |
A385499 | a(n) is the smallest integer k such that A385392(k) = n. | [
"1",
"2",
"6",
"42",
"70",
"870",
"44070",
"547470",
"15410670",
"168638470"
]
| [
"nonn",
"more",
"new"
]
| 14 | 1 | 2 | [
"A384237",
"A384781",
"A384854",
"A385100",
"A385391",
"A385392",
"A385499"
]
| null | Juri-Stepan Gerasimov, Jun 30 2025 | 2025-07-08T01:03:49 | oeisdata/seq/A385/A385499.seq | d927312d40abc2d63e84238aa2034bfb |
A385500 | Expansion of e.g.f. exp( -LambertW(-arctanh(x)) ). | [
"1",
"1",
"3",
"18",
"149",
"1640",
"22359",
"366128",
"6998697",
"153191808",
"3779353515",
"103800229632",
"3141633970749",
"103904351855616",
"3728602377979647",
"144297781732300800",
"5991021498320041809",
"265636734347975688192",
"12527923794824003280723",
"626224876080360687599616"
]
| [
"nonn",
"new"
]
| 13 | 0 | 3 | [
"A111594",
"A385425",
"A385500",
"A385501",
"A385502"
]
| null | Seiichi Manyama, Jul 01 2025 | 2025-07-01T08:48:54 | oeisdata/seq/A385/A385500.seq | c3aeba6a4052db3eaf01037ff1d86c73 |
A385501 | Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-arctanh(x)) ). | [
"1",
"1",
"3",
"18",
"165",
"2040",
"31815",
"599760",
"13268745",
"337115520",
"9674678475",
"309554784000",
"10927053262125",
"421849524096000",
"17682153623909775",
"799730490214656000",
"38820939579369572625",
"2013202580708487168000",
"111081054630965602057875",
"6497703571257963896832000"
]
| [
"nonn",
"new"
]
| 19 | 0 | 3 | [
"A001147",
"A111594",
"A138020",
"A227466",
"A385426",
"A385500",
"A385501",
"A385502"
]
| null | Seiichi Manyama, Jul 01 2025 | 2025-07-01T09:55:52 | oeisdata/seq/A385/A385501.seq | 622790715d4513c43880ccdf068e2c80 |
A385502 | E.g.f. A(x) satisfies A(x) = exp( arctanh(x * A(x)) / A(x) ). | [
"1",
"1",
"1",
"3",
"25",
"205",
"2001",
"25991",
"394353",
"6718041",
"130319745",
"2833146987",
"67767170505",
"1772434086501",
"50392083769041",
"1546052750636655",
"50905035315373281",
"1790951445870568113",
"67050161599822764417",
"2661363261252799648083",
"111637709182606749500025"
]
| [
"nonn",
"new"
]
| 18 | 0 | 4 | [
"A111594",
"A385428",
"A385500",
"A385501",
"A385502"
]
| null | Seiichi Manyama, Jul 01 2025 | 2025-07-01T08:48:42 | oeisdata/seq/A385/A385502.seq | d0b680fa480a15a967a481624b2f6f7a |
A385503 | Popular primes. | [
"2",
"3",
"5",
"7",
"13",
"19",
"23",
"31",
"43",
"47",
"73",
"83",
"109",
"113",
"199",
"283",
"467",
"661",
"773",
"887",
"1109",
"1129",
"1327",
"1627",
"2143",
"2399",
"2477",
"2803",
"2861",
"2971",
"3739",
"3931",
"3947",
"4297"
]
| [
"nonn",
"more",
"new"
]
| 18 | 1 | 1 | [
"A006530",
"A124661",
"A246033",
"A385503"
]
| null | Peter Munn, Jul 01 2025 | 2025-07-02T14:41:21 | oeisdata/seq/A385/A385503.seq | 52b61f60ca4769f0423b28d867416e56 |
A385505 | Decimal expansion of the volume of a biaugmented triangular prism with unit edge. | [
"9",
"0",
"4",
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"1",
"7",
"2",
"2",
"2",
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]
| [
"nonn",
"cons",
"easy",
"new"
]
| 9 | 0 | 1 | [
"A020763",
"A384141",
"A385505",
"A385506"
]
| null | Paolo Xausa, Jul 01 2025 | 2025-07-01T08:29:13 | oeisdata/seq/A385/A385505.seq | 5cb80f3dea50b16916dc978ce26da888 |
A385506 | Decimal expansion of the volume of a triaugmented triangular prism with unit edge. | [
"1",
"1",
"4",
"0",
"1",
"1",
"9",
"4",
"8",
"3",
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]
| [
"nonn",
"cons",
"easy",
"new"
]
| 8 | 1 | 3 | [
"A002194",
"A010466",
"A010503",
"A097715",
"A120011",
"A385505",
"A385506"
]
| null | Paolo Xausa, Jul 01 2025 | 2025-07-01T08:29:09 | oeisdata/seq/A385/A385506.seq | f8eeb322bd2b8f5212c579550c36e3cd |
A385507 | a(n) = v(1 + F(2*n - 1)), where F(x) = (3*x + 1)/2^v(3*x + 1), x is any odd natural number, and v(y) is the 2-adic valuation of y. | [
"1",
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"4"
]
| [
"nonn",
"new"
]
| 13 | 1 | 4 | [
"A001511",
"A338199",
"A385507"
]
| null | Hugo Leeney, Jul 01 2025 | 2025-07-06T17:09:29 | oeisdata/seq/A385/A385507.seq | 5ff35b5a1c4719d9cc68f14a76cfb42b |
A385508 | Decimal expansion of Sum_{k>=1} Fibonacci(k)/Catalan(k). | [
"2",
"3",
"5",
"1",
"9",
"6",
"8",
"9",
"1",
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"8",
"9",
"1",
"5",
"4",
"2",
"5",
"5",
"7",
"5",
"8",
"3",
"0",
"3",
"0",
"3",
"3",
"6",
"2",
"6",
"9",
"5",
"3",
"8",
"0",
"0",
"6",
"9",
"7",
"9",
"8",
"9",
"2",
"5",
"0",
"0",
"6"
]
| [
"nonn",
"cons",
"new"
]
| 11 | 1 | 1 | [
"A000045",
"A000108",
"A385450",
"A385508"
]
| null | Vaclav Kotesovec, Jul 01 2025 | 2025-07-02T03:21:19 | oeisdata/seq/A385/A385508.seq | 4e119d41b874262273df14f8b3fbfcc7 |
A385509 | Decimal expansion of the volume of an augmented pentagonal prism with unit edge. | [
"1",
"9",
"5",
"6",
"1",
"7",
"9",
"6",
"6",
"0",
"9",
"8",
"4",
"4",
"8",
"2",
"7",
"6",
"4",
"2",
"2",
"5",
"9",
"6",
"0",
"0",
"9",
"8",
"0",
"9",
"0",
"2",
"2",
"5",
"9",
"4",
"5",
"8",
"3",
"5",
"6",
"5",
"2",
"8",
"1",
"5",
"9",
"0",
"6",
"3",
"5",
"6",
"3",
"4",
"1",
"4",
"0",
"3",
"2",
"0",
"7",
"9",
"9",
"6",
"6",
"8",
"8",
"9",
"9",
"1",
"0",
"7",
"1",
"9",
"5",
"2",
"6",
"5",
"0",
"7",
"3",
"7",
"8",
"0",
"7",
"5",
"0",
"5",
"8",
"3"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 10 | 1 | 2 | [
"A002163",
"A385509",
"A385510"
]
| null | Paolo Xausa, Jul 01 2025 | 2025-07-02T16:54:40 | oeisdata/seq/A385/A385509.seq | c63eae021e41aed3abdcd9729404b7e8 |
A385510 | Decimal expansion of the surface area of an augmented pentagonal prism with unit edge. | [
"9",
"1",
"7",
"3",
"0",
"0",
"5",
"6",
"0",
"8",
"7",
"4",
"6",
"8",
"1",
"1",
"1",
"3",
"9",
"0",
"4",
"5",
"4",
"7",
"0",
"2",
"9",
"6",
"2",
"8",
"3",
"0",
"9",
"1",
"5",
"6",
"5",
"7",
"5",
"7",
"5",
"5",
"3",
"5",
"9",
"3",
"8",
"3",
"0",
"7",
"7",
"7",
"2",
"8",
"6",
"4",
"6",
"9",
"9",
"9",
"6",
"3",
"9",
"3",
"4",
"9",
"9",
"6",
"7",
"1",
"0",
"0",
"1",
"3",
"2",
"6",
"7",
"3",
"2",
"4",
"9",
"9",
"7",
"4",
"6",
"0",
"2",
"8",
"6",
"6"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 7 | 1 | 1 | [
"A002163",
"A002194",
"A385509",
"A385510"
]
| null | Paolo Xausa, Jul 02 2025 | 2025-07-02T14:41:40 | oeisdata/seq/A385/A385510.seq | 824289ba2a64c8e2a4d180600340638d |
A385511 | Numbers that are less than the number of their ordered factorizations into squarefree numbers greater than 1. | [
"2520",
"5040",
"7560",
"10080",
"10800",
"12600",
"15120",
"20160",
"21600",
"22680",
"23760",
"25200",
"27720",
"30240",
"32400",
"35280",
"37800",
"43200",
"45360",
"47520",
"50400",
"52920",
"55440",
"60480",
"64800",
"65520",
"70560",
"71280",
"75600",
"79200",
"83160",
"86400",
"88200",
"90720",
"95040",
"98280",
"100800",
"105840"
]
| [
"nonn",
"new"
]
| 7 | 1 | 1 | [
"A005117",
"A050328",
"A118914",
"A147516",
"A270308",
"A340155",
"A385511"
]
| null | Amiram Eldar, Jul 01 2025 | 2025-07-01T10:14:12 | oeisdata/seq/A385/A385511.seq | 1ab4f4cae1ff2f0df03180bd7b75a987 |
A385512 | a(n) is the least prime p > n in which the digits of n appear as an ordered but not necessarily contiguous subsequence. | [
"101",
"11",
"23",
"13",
"41",
"53",
"61",
"17",
"83",
"19",
"101",
"101",
"127",
"103",
"149",
"151",
"163",
"107",
"181",
"109",
"1201",
"211",
"223",
"223",
"241",
"251",
"263",
"127",
"281",
"229",
"307",
"131",
"1321",
"233",
"347",
"353",
"367",
"137",
"383",
"139",
"401",
"241",
"421",
"431",
"443",
"457",
"461",
"347",
"487",
"149",
"503",
"151",
"521",
"353",
"541"
]
| [
"nonn",
"base",
"new"
]
| 23 | 0 | 1 | [
"A000040",
"A068164",
"A381606",
"A385512"
]
| null | Jean-Marc Rebert, Jul 01 2025 | 2025-07-06T17:22:27 | oeisdata/seq/A385/A385512.seq | c35620e8120f1ba8d83ba54ef48b0aae |
A385515 | Repdigit numbers whose square does not contain the repeated digit. | [
"2",
"3",
"4",
"7",
"8",
"9",
"22",
"33",
"44",
"77",
"88",
"333",
"444",
"3333",
"33333",
"44444",
"88888",
"333333",
"3333333",
"33333333",
"333333333",
"3333333333",
"33333333333",
"333333333333",
"3333333333333",
"33333333333333",
"333333333333333",
"3333333333333333",
"33333333333333333",
"333333333333333333"
]
| [
"nonn",
"base",
"new"
]
| 18 | 1 | 1 | [
"A002277",
"A010785",
"A029783",
"A385515"
]
| null | Gonzalo Martínez, Jul 01 2025 | 2025-07-08T07:51:26 | oeisdata/seq/A385/A385515.seq | 0c96813d71ff227f35376665263dfc16 |
A385516 | Perfect powers whose digits are in strictly decreasing order. | [
"1",
"4",
"8",
"9",
"32",
"64",
"81",
"841",
"961"
]
| [
"nonn",
"base",
"fini",
"full",
"new"
]
| 5 | 1 | 2 | [
"A001597",
"A009995",
"A355060",
"A355062",
"A355063",
"A385516",
"A385517"
]
| null | Stefano Spezia, Jul 01 2025 | 2025-07-02T16:56:26 | oeisdata/seq/A385/A385516.seq | 2658da28e3f71011cc896b97cd00b425 |
A385517 | Perfect powers whose digits are in nonincreasing order. | [
"1",
"4",
"8",
"9",
"32",
"64",
"81",
"100",
"400",
"441",
"841",
"900",
"961",
"1000",
"6400",
"7744",
"7776",
"8000",
"8100",
"10000",
"40000",
"44100",
"64000",
"84100",
"90000",
"96100",
"100000",
"640000",
"774400",
"810000",
"1000000",
"3200000",
"4000000",
"4410000",
"8000000",
"8410000",
"8874441",
"9000000",
"9610000",
"9853321",
"10000000"
]
| [
"nonn",
"base",
"new"
]
| 5 | 1 | 2 | [
"A001597",
"A009995",
"A355060",
"A355062",
"A355063",
"A385516",
"A385517"
]
| null | Stefano Spezia, Jul 01 2025 | 2025-07-02T16:56:14 | oeisdata/seq/A385/A385517.seq | c97fcbe95f7ad9dd7fb98f729de80abc |
A385518 | Numbers k such that (37^k - 3^k)/34 is prime. | [
"3",
"137",
"197",
"2113",
"4729",
"11497"
]
| [
"nonn",
"hard",
"more",
"new"
]
| 4 | 1 | 1 | [
"A062587",
"A062589",
"A127996",
"A127997",
"A128344",
"A204940",
"A217320",
"A225807",
"A229542",
"A375161",
"A375236",
"A377031",
"A385518"
]
| null | Robert Price, Jul 01 2025 | 2025-07-06T00:50:34 | oeisdata/seq/A385/A385518.seq | 97d4fd286ee813bd564bc87b949bb6ee |
A385519 | Primes p that divide both 2^k + 3 and 3^k + 2 for some k. | [
"5",
"7",
"463",
"5333",
"586471",
"12690943",
"18414001"
]
| [
"nonn",
"hard",
"more",
"new"
]
| 5 | 1 | 1 | [
"A196627",
"A385519"
]
| null | Robert Israel, Jul 01 2025 | 2025-07-06T00:51:01 | oeisdata/seq/A385/A385519.seq | c570d5db441c763bfd395ad2a35eb0e6 |
A385520 | Expansion of Product_{k>0} ((1 - q^(2*k))*(1 - q^(6*k))^3)/((1 - q^k)*(1 - q^(3*k))*(1 - q^(4*k))*(1 - q^(12*k))). | [
"1",
"1",
"1",
"3",
"4",
"5",
"6",
"9",
"13",
"16",
"20",
"27",
"36",
"44",
"54",
"69",
"88",
"107",
"130",
"162",
"200",
"240",
"288",
"351",
"426",
"507",
"602",
"723",
"864",
"1019",
"1200",
"1422",
"1681",
"1968",
"2300",
"2700",
"3160",
"3674",
"4266",
"4965",
"5768",
"6665",
"7692",
"8892",
"10260",
"11792",
"13536",
"15552",
"17844",
"20407"
]
| [
"nonn",
"new"
]
| 16 | 0 | 4 | [
"A293306",
"A385520"
]
| null | James Sellers, Jul 01 2025 | 2025-07-02T09:35:02 | oeisdata/seq/A385/A385520.seq | 18f6eca3888e6d4f31c635bc320f7e88 |
A385521 | Decimal expansion of a constant related to A375838. | [
"1",
"5",
"9",
"5",
"8",
"5",
"4",
"3",
"3",
"0",
"5",
"0",
"0",
"3",
"6",
"6",
"2",
"1",
"2",
"4",
"7",
"0",
"0",
"6",
"5",
"6",
"9",
"7",
"4",
"0",
"0",
"1",
"6",
"5",
"1",
"6",
"9",
"6",
"4",
"5",
"0",
"2",
"5",
"0",
"5",
"8",
"4",
"8",
"3",
"2",
"4",
"0",
"6",
"4",
"2",
"4",
"7",
"9",
"4",
"1",
"8",
"9",
"0",
"9",
"3",
"4",
"1",
"1",
"9",
"1",
"0",
"3",
"8",
"6",
"1",
"2",
"7",
"7",
"4",
"3",
"8",
"1",
"3",
"9",
"3",
"5",
"8",
"2",
"4",
"0",
"2",
"3",
"5",
"5",
"5",
"9",
"9",
"6",
"5",
"8",
"7",
"7",
"1",
"8",
"3"
]
| [
"nonn",
"cons",
"new"
]
| 9 | 1 | 2 | [
"A005121",
"A086053",
"A086555",
"A131407",
"A246040",
"A260932",
"A330804",
"A331957",
"A375838",
"A385521"
]
| null | Vaclav Kotesovec, Jul 01 2025 | 2025-07-02T03:55:06 | oeisdata/seq/A385/A385521.seq | 63989bd8256d1a52968dd72f30ef4130 |
A385523 | Numbers that are not cycle counts of inseparable graphs. | [
"2",
"4",
"5",
"8",
"9",
"16"
]
| [
"nonn",
"fini",
"full",
"new"
]
| 23 | 1 | 1 | [
"A385523",
"A385524"
]
| null | Thomas Zaslavsky, Jul 01 2025 | 2025-07-09T14:09:24 | oeisdata/seq/A385/A385523.seq | 13b5a70a47c752dd97282e89cefc087c |
A385524 | Numbers that are not cycle counts of inseparable cubic graphs. | [
"2",
"4",
"5",
"8",
"9",
"13",
"16"
]
| [
"nonn",
"fini",
"full",
"new"
]
| 20 | 1 | 1 | [
"A385523",
"A385524"
]
| null | Thomas Zaslavsky, Jul 01 2025 | 2025-07-08T23:42:12 | oeisdata/seq/A385/A385524.seq | 07f81cee53c6ab8233d7f6f185c08e89 |
A385526 | E.g.f. A(x) satisfies A(x) = exp(x*A(3*x)). | [
"1",
"1",
"7",
"208",
"23365",
"9588976",
"14040296659",
"71747056999360",
"1255862559932597257",
"74168744207577385109248",
"14599375893944236344767578111",
"9483024632344097320792984610415616",
"20158786175666520486280070249843236771213",
"139271933359690469686747131442731382830399594496"
]
| [
"nonn",
"new"
]
| 14 | 0 | 3 | [
"A000272",
"A015084",
"A096538",
"A141369",
"A385526",
"A385527",
"A385528",
"A385529",
"A385530"
]
| null | Seiichi Manyama, Jul 02 2025 | 2025-07-02T04:18:32 | oeisdata/seq/A385/A385526.seq | dbe1742cb53e6d255d7c3fb6bb1f933a |
A385527 | E.g.f. A(x) satisfies A(x) = exp(x*A(4*x)). | [
"1",
"1",
"9",
"457",
"118961",
"152894961",
"940318147705",
"26967408304580857",
"3534888068831469959649",
"2084993641133372935803249505",
"5465706581663919414225671125834601",
"63043356313898446097762231466174924913065",
"3173076775252515207774429654590479617164788572049"
]
| [
"nonn",
"new"
]
| 13 | 0 | 3 | [
"A000272",
"A015085",
"A096538",
"A141369",
"A385526",
"A385527",
"A385528",
"A385529",
"A385530"
]
| null | Seiichi Manyama, Jul 02 2025 | 2025-07-02T04:18:41 | oeisdata/seq/A385/A385527.seq | ec295578e032cbb7be0c85374ae4e78a |
A385528 | E.g.f. A(x) satisfies A(x) = exp(x*A(-2*x)). | [
"1",
"1",
"-3",
"-47",
"1385",
"119601",
"-22345691",
"-10181013695",
"10346973518097",
"23934447308323873",
"-122307331801326167539",
"-1379021793666951568998159",
"33874331587448813081748999673",
"1804181313330860398948564389193681",
"-206892703326367302570264123699846971211"
]
| [
"sign",
"new"
]
| 10 | 0 | 3 | [
"A000272",
"A015097",
"A096538",
"A141369",
"A385526",
"A385527",
"A385528",
"A385529",
"A385530"
]
| null | Seiichi Manyama, Jul 02 2025 | 2025-07-02T14:42:34 | oeisdata/seq/A385/A385528.seq | 79ca7bba00ddbade7efa70de5961e708 |
A385529 | E.g.f. A(x) satisfies A(x) = exp(x*A(-3*x)). | [
"1",
"1",
"-5",
"-152",
"15949",
"6548656",
"-9510189137",
"-48598095401792",
"849885323784381337",
"50192539805114962349824",
"-9878895951508580401879879229",
"-6416836884643090722807370469927936",
"13640603845766595275775514993987722683941",
"94239467260528503337471761892783659993298198528"
]
| [
"sign",
"new"
]
| 10 | 0 | 3 | [
"A000272",
"A015098",
"A096538",
"A141369",
"A385526",
"A385527",
"A385528",
"A385529",
"A385530"
]
| null | Seiichi Manyama, Jul 02 2025 | 2025-07-02T14:42:27 | oeisdata/seq/A385/A385529.seq | 487b2d6a6d3a06e26428f0fe1da5ebba |
A385530 | E.g.f. A(x) satisfies A(x) = exp(x*A(-4*x)). | [
"1",
"1",
"-7",
"-359",
"90705",
"116586321",
"-715618113143",
"-20523234900205911",
"2689857437569063003169",
"1586566688643256394542888225",
"-4159073515698730238218108546470759",
"-47972197129364591236078587520718376138951",
"2414519164037893898620724924577882591112859773297"
]
| [
"sign",
"new"
]
| 11 | 0 | 3 | [
"A000272",
"A015099",
"A096538",
"A141369",
"A385526",
"A385527",
"A385528",
"A385529",
"A385530"
]
| null | Seiichi Manyama, Jul 02 2025 | 2025-07-02T14:42:21 | oeisdata/seq/A385/A385530.seq | bf60a23728c7a32c74324824d9da0390 |
A385531 | Numbers x such that there exist three integers 0<x<=y<=z and t>0 such that sigma(x)^2 = sigma(y)^2 = sigma(z)^2 = x^2 + y^2 + z^2 + t^2. | [
"4",
"6",
"28",
"45",
"48",
"60",
"156",
"204",
"208",
"360",
"496",
"1170",
"2016",
"2520",
"2925",
"3480",
"4796",
"5532",
"5733",
"7152",
"7605",
"8128",
"9680",
"11050",
"12402",
"15776",
"33468",
"36720",
"37064",
"38408",
"43584",
"50960",
"55216",
"63708",
"70364",
"83772",
"92280",
"106700",
"114840",
"116288",
"149400",
"163800",
"166617",
"167580"
]
| [
"nonn",
"hard",
"new"
]
| 35 | 1 | 1 | [
"A000203",
"A000414",
"A385356",
"A385397",
"A385531"
]
| null | S. I. Dimitrov, Jul 02 2025 | 2025-07-09T23:33:33 | oeisdata/seq/A385/A385531.seq | 4fd2ef2027cf5491f412f25c19aafb24 |
A385532 | Second prepended column of the tribonacci array of the second kind, A385436. | [
"-1",
"0",
"0",
"1",
"2",
"2",
"3",
"4",
"4",
"5",
"6",
"6",
"7",
"7",
"8",
"9",
"9",
"10",
"11",
"11",
"12",
"13",
"13",
"14",
"15",
"15",
"16",
"17",
"17",
"18",
"19",
"19",
"20",
"20",
"21",
"22",
"22",
"23",
"24",
"24",
"25",
"26",
"26",
"27",
"28",
"28",
"29",
"30",
"30",
"31",
"31",
"32",
"33",
"33",
"34",
"35",
"35",
"36",
"37",
"37",
"38",
"39",
"39",
"40",
"41",
"41",
"42",
"43",
"43",
"44"
]
| [
"sign",
"new"
]
| 18 | 1 | 5 | [
"A278039",
"A385436",
"A385532"
]
| null | A.H.M. Smeets, Jul 02 2025 | 2025-07-09T10:17:06 | oeisdata/seq/A385/A385532.seq | f8e527d7d9ec847bf745d845791b4691 |
A385533 | Third prepended column of the tribonacci array of the second kind, A385436. | [
"-1",
"-1",
"0",
"0",
"0",
"1",
"1",
"1",
"2",
"2",
"2",
"3",
"3",
"4",
"4",
"4",
"5",
"5",
"5",
"6",
"6",
"6",
"7",
"7",
"7",
"8",
"8",
"8",
"9",
"9",
"9",
"10",
"10",
"11",
"11",
"11",
"12",
"12",
"12",
"13",
"13",
"13",
"14",
"14",
"14",
"15",
"15",
"15",
"16",
"16",
"17",
"17",
"17",
"18",
"18",
"18",
"19",
"19",
"19",
"20",
"20",
"20",
"21",
"21",
"21",
"22",
"22",
"22",
"23",
"23",
"24",
"24",
"24"
]
| [
"sign",
"new"
]
| 15 | 1 | 9 | [
"A353084",
"A385436",
"A385533"
]
| null | A.H.M. Smeets, Jul 02 2025 | 2025-07-09T10:17:17 | oeisdata/seq/A385/A385533.seq | e130fe3a442eac5b8353360ab4e19a9f |
A385534 | Decimal expansion of the volume of a biaugmented pentagonal prism with unit edge. | [
"2",
"1",
"9",
"1",
"8",
"8",
"1",
"9",
"2",
"1",
"3",
"7",
"9",
"9",
"9",
"8",
"6",
"0",
"5",
"6",
"9",
"2",
"9",
"0",
"8",
"2",
"1",
"8",
"7",
"9",
"1",
"8",
"4",
"2",
"2",
"9",
"2",
"2",
"6",
"3",
"9",
"3",
"1",
"4",
"6",
"1",
"8",
"0",
"2",
"5",
"1",
"4",
"3",
"5",
"3",
"5",
"9",
"9",
"3",
"2",
"1",
"2",
"8",
"6",
"3",
"5",
"4",
"1",
"1",
"3",
"1",
"5",
"1",
"6",
"9",
"6",
"3",
"3",
"5",
"2",
"4",
"4",
"2",
"8",
"2",
"5",
"7",
"0",
"4",
"1"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 8 | 1 | 1 | [
"A002163",
"A385509",
"A385534",
"A385535"
]
| null | Paolo Xausa, Jul 03 2025 | 2025-07-03T10:05:42 | oeisdata/seq/A385/A385534.seq | 671e9476a960674265d630c50d90721b |
A385535 | Decimal expansion of the surface area of a biaugmented pentagonal prism with unit edge. | [
"9",
"9",
"0",
"5",
"0",
"5",
"6",
"4",
"1",
"6",
"3",
"1",
"5",
"6",
"8",
"8",
"4",
"3",
"2",
"5",
"7",
"2",
"9",
"1",
"6",
"6",
"3",
"7",
"7",
"8",
"8",
"9",
"6",
"3",
"9",
"3",
"2",
"7",
"0",
"0",
"3",
"5",
"8",
"8",
"4",
"7",
"6",
"4",
"1",
"1",
"5",
"7",
"9",
"1",
"4",
"5",
"2",
"5",
"8",
"0",
"3",
"3",
"7",
"2",
"9",
"5",
"1",
"6",
"0",
"4",
"0",
"1",
"8",
"2",
"3",
"5",
"5",
"3",
"2",
"5",
"3",
"6",
"8",
"2",
"7",
"1",
"7",
"4",
"8",
"5"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 7 | 1 | 1 | [
"A002163",
"A010469",
"A385510",
"A385534",
"A385535"
]
| null | Paolo Xausa, Jul 03 2025 | 2025-07-03T10:05:38 | oeisdata/seq/A385/A385535.seq | 9f8406279f947203555850312b772a0e |
A385536 | Integers k formed by the concatenation of 3 consecutive prime numbers such that k is divisible by at least one of those 3 primes. | [
"235",
"357",
"71113",
"374143",
"616771",
"167173179",
"143914471451",
"909071909089909091",
"104651162787110465116278991046511627907"
]
| [
"nonn",
"base",
"more",
"new"
]
| 20 | 1 | 1 | [
"A132903",
"A255669",
"A258182",
"A385536"
]
| null | Gonzalo Martínez, Jul 02 2025 | 2025-07-10T22:52:24 | oeisdata/seq/A385/A385536.seq | cea89658f866a99fda241d80f246d12a |
A385537 | Indices k such that the repunit (10^k-1)/9 is coprime with any other nonzero binary vector of the same length in base 10. | [
"0",
"1",
"2",
"3",
"5",
"7",
"11",
"17",
"19",
"23"
]
| [
"nonn",
"base",
"more",
"new"
]
| 29 | 1 | 3 | [
"A004023",
"A378199",
"A378511",
"A378761",
"A385537",
"A385539",
"A385579"
]
| null | Dmytro Inosov, Jul 02 2025 | 2025-07-07T17:21:16 | oeisdata/seq/A385/A385537.seq | 5a50eea0fad82c36c9003809c3c363d4 |
A385540 | Number of values of nonnegative s < n such that s^s == (-s)^s == s (mod n). | [
"1",
"1",
"0",
"0",
"0",
"2",
"1",
"0",
"1",
"2",
"0",
"1",
"0",
"3",
"2",
"0",
"0",
"4",
"0",
"1",
"2",
"3",
"1",
"1",
"2",
"4",
"1",
"3",
"0",
"4",
"1",
"0",
"3",
"2",
"1",
"3",
"1",
"3",
"2",
"1",
"1",
"6",
"0",
"3",
"4",
"3",
"1",
"1",
"3",
"6",
"2",
"2",
"0",
"4",
"3",
"2",
"1",
"3",
"0",
"3",
"1",
"3",
"7",
"0",
"3",
"6",
"0",
"1",
"3",
"6",
"1",
"3",
"1",
"4",
"5",
"3",
"4",
"6",
"1",
"1",
"4",
"3",
"0",
"5",
"0",
"4",
"4",
"2",
"1",
"8",
"4",
"2",
"3",
"3",
"2",
"1",
"0",
"8",
"5",
"5"
]
| [
"nonn",
"new"
]
| 12 | 1 | 6 | [
"A065295",
"A384781",
"A385540",
"A385541"
]
| null | Juri-Stepan Gerasimov, Jul 02 2025 | 2025-07-09T10:15:49 | oeisdata/seq/A385/A385540.seq | cc15be0aa51d82066612494e21fcbdf0 |
A385541 | Number of divisors of n such that d^d == (-d)^d == d (mod n). | [
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"4",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"3",
"1",
"2",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"1"
]
| [
"nonn",
"new"
]
| 6 | 1 | 2 | [
"A000005",
"A384237",
"A384854",
"A385392",
"A385540",
"A385541"
]
| null | Juri-Stepan Gerasimov, Jul 02 2025 | 2025-07-07T23:48:07 | oeisdata/seq/A385/A385541.seq | f741ba280c4579b9eb59a80301a7d00d |
A385542 | The sum of the aliquot divisors of n that are powerful. | [
"0",
"1",
"1",
"1",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"13",
"1",
"10",
"1",
"5",
"1",
"1",
"1",
"13",
"1",
"1",
"10",
"5",
"1",
"1",
"1",
"29",
"1",
"1",
"1",
"14",
"1",
"1",
"1",
"13",
"1",
"1",
"1",
"5",
"10",
"1",
"1",
"29",
"1",
"26",
"1",
"5",
"1",
"37",
"1",
"13",
"1",
"1",
"1",
"5",
"1",
"1",
"10",
"61",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"58",
"1",
"1",
"26",
"5",
"1",
"1",
"1",
"29",
"37"
]
| [
"nonn",
"easy",
"new"
]
| 11 | 1 | 8 | [
"A001248",
"A001694",
"A002117",
"A005117",
"A078434",
"A112526",
"A167207",
"A183097",
"A385542"
]
| null | Amiram Eldar, Jul 03 2025 | 2025-07-05T08:59:32 | oeisdata/seq/A385/A385542.seq | 3bc0daa8800fbb768a1e35432149ef14 |
A385543 | G.f. A(x) satisfies A(x) = Sum_{k>=0} x^k * A(k^2*x). | [
"1",
"1",
"2",
"7",
"49",
"676",
"18861",
"1062533",
"121557594",
"28281916427",
"13399862563765",
"12949857822909156",
"25549330363139585961",
"103025771800413460066681",
"849971455496325163128172498",
"14359775106466928789344919850719",
"497276944869002836686738999984515113"
]
| [
"nonn",
"easy",
"new"
]
| 13 | 0 | 3 | [
"A125282",
"A385543",
"A385547"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T15:01:59 | oeisdata/seq/A385/A385543.seq | eb7559f14cd71d43ac592d5cc1a15ae3 |
A385544 | G.f. A(x) satisfies A(x) = 1 + Sum_{k>=1} k * x^k * A(k*x). | [
"1",
"1",
"3",
"10",
"47",
"309",
"2846",
"37021",
"681653",
"17809832",
"661559047",
"34979604911",
"2635492535328",
"283176079413813",
"43418520087991775",
"9505069880265893234",
"2972315533856872301859",
"1328214006502208982129889",
"848461208731369665554869614",
"775048547251487987362405899361"
]
| [
"nonn",
"easy",
"new"
]
| 14 | 0 | 3 | [
"A125282",
"A385544",
"A385548"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T05:46:39 | oeisdata/seq/A385/A385544.seq | 992b4e4e2dcdfa7c120efcf12d21a1c6 |
A385545 | G.f. A(x) satisfies A(x) = 1 + Sum_{k>=1} x^k * A(k^k*x). | [
"1",
"1",
"2",
"7",
"67",
"2230",
"291361",
"175199847",
"539106921036",
"9670093811773995",
"1069862206887191422681",
"807978416441576833409563956",
"4375214603169633800454711727052741",
"183123024189390881947159236684046056294761",
"63910309174503171773375590763352136484437788465230"
]
| [
"nonn",
"easy",
"new"
]
| 8 | 0 | 3 | [
"A385545",
"A385549"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T05:39:10 | oeisdata/seq/A385/A385545.seq | 259db92b1c907ac2069261e43cb9edce |
A385546 | E.g.f. A(x) satisfies A(x) = Sum_{k>=0} x^k/k! * A(2*k*x). | [
"1",
"1",
"5",
"73",
"2841",
"275841",
"64191133",
"34819498953",
"43138054887665",
"120180168811524673",
"743714973197251893621",
"10121932780068673030506249",
"300492979488426431579059718281",
"19324971141736799892467667226925889",
"2676450415125002650227336306537165370253",
"794234262095484293816451881720629809901365001"
]
| [
"nonn",
"new"
]
| 14 | 0 | 3 | [
"A125281",
"A195067",
"A385546",
"A385550"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T07:29:26 | oeisdata/seq/A385/A385546.seq | a654fd6ece21b66208e7e4c366b52538 |
A385547 | E.g.f. A(x) satisfies A(x) = Sum_{k>=0} x^k/k! * A(k^2*x). | [
"1",
"1",
"3",
"22",
"413",
"18656",
"2030287",
"513423436",
"300561564025",
"398653905380896",
"1192260459720446171",
"7941386767782184832204",
"117226647607145106003271333",
"3808187092459275036716509871776",
"271053748414379190468548152694690551",
"42093494971632722160142716694680694172956"
]
| [
"nonn",
"new"
]
| 11 | 0 | 3 | [
"A125281",
"A385543",
"A385547"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T14:24:21 | oeisdata/seq/A385/A385547.seq | 0fb8891f5a3580deb4fd53c318cc043f |
A385548 | E.g.f. A(x) satisfies A(x) = 1 + Sum_{k>=1} k * x^k/k! * A(k*x). | [
"1",
"1",
"4",
"27",
"340",
"7185",
"254046",
"14579341",
"1345796824",
"196990674705",
"45358607173690",
"16288829003062341",
"9064769868554283060",
"7771093242706161635449",
"10211642577081863563621990",
"20477419392449457003138477885",
"62420691099194078521450782932656"
]
| [
"nonn",
"new"
]
| 9 | 0 | 3 | [
"A385544",
"A385548"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T05:42:33 | oeisdata/seq/A385/A385548.seq | f295c6698e4895d8f550d0675f5e4e38 |
A385549 | E.g.f. A(x) satisfies A(x) = 1 + Sum_{k>=1} x^k/k! * A(k^k*x). | [
"1",
"1",
"3",
"22",
"485",
"39656",
"13728727",
"23504091976",
"217222339567305",
"11972137817048914432",
"4304083020059321056972331",
"10600269341446094180819889667904",
"198940291371181763050955199480451552141",
"29410239601719493601916774106238015393066939104"
]
| [
"nonn",
"new"
]
| 9 | 0 | 3 | [
"A385545",
"A385549"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T05:43:27 | oeisdata/seq/A385/A385549.seq | 0868170bacb6964318b3981906187b89 |
A385550 | E.g.f. A(x) satisfies A(x) = Sum_{k>=0} x^k/k! * A(-k*x). | [
"1",
"1",
"-1",
"-8",
"-3",
"516",
"235",
"-336258",
"-3909367",
"1462013704",
"28386802071",
"-43272301150110",
"-3999150112115411",
"7064064858964289580",
"1224799123758409303091",
"-6776368902478388538739274",
"-3903339581644484604889375215",
"32981625415507385681195122476432"
]
| [
"sign",
"new"
]
| 9 | 0 | 4 | [
"A125281",
"A385546",
"A385550",
"A385551"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T09:30:15 | oeisdata/seq/A385/A385550.seq | a43e828006b4f7df5e423107cae13d25 |
A385551 | G.f. A(x) satisfies A(x) = Sum_{k>=0} x^k * A(-k*x). | [
"1",
"1",
"0",
"-1",
"-1",
"4",
"3",
"-147",
"-770",
"15721",
"107475",
"-10571326",
"-227719699",
"23388067045",
"997369658304",
"-266390905549461",
"-23979310388230253",
"11854227262950292612",
"2477760824989752459951",
"-2291696206079126389222423",
"-973819883013544085453392378",
"1953283201528648806346685956669"
]
| [
"sign",
"easy",
"new"
]
| 9 | 0 | 6 | [
"A125282",
"A195067",
"A385550",
"A385551"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-03T09:30:19 | oeisdata/seq/A385/A385551.seq | 64a263ef52d4049fc5d35bc3c82dc208 |
A385552 | Period of {binomial(N,n) mod 5: N in Z}. | [
"1",
"5",
"5",
"5",
"5",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"25",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125",
"125"
]
| [
"nonn",
"easy",
"new"
]
| 17 | 0 | 2 | [
"A062383",
"A064235",
"A349593",
"A385552",
"A385553",
"A385554"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-06T12:22:53 | oeisdata/seq/A385/A385552.seq | 6b1f55c2cf03a58292d86f19f6071640 |
A385553 | Period of {binomial(N,n) mod 6: N in Z}. | [
"1",
"6",
"12",
"36",
"72",
"72",
"72",
"72",
"144",
"432",
"432",
"432",
"432",
"432",
"432",
"432",
"864",
"864",
"864",
"864",
"864",
"864",
"864",
"864",
"864",
"864",
"864",
"2592",
"2592",
"2592",
"2592",
"2592",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184",
"5184"
]
| [
"nonn",
"easy",
"new"
]
| 13 | 0 | 2 | [
"A062383",
"A064235",
"A349593",
"A385552",
"A385553",
"A385554"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-06T10:06:52 | oeisdata/seq/A385/A385553.seq | 8cda2bb293cc2e7a2698f97b7471d1c1 |
A385554 | Period of {binomial(N,n) mod 10: N in Z}. | [
"1",
"10",
"20",
"20",
"40",
"200",
"200",
"200",
"400",
"400",
"400",
"400",
"400",
"400",
"400",
"400",
"800",
"800",
"800",
"800",
"800",
"800",
"800",
"800",
"800",
"4000",
"4000",
"4000",
"4000",
"4000",
"4000",
"4000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000",
"8000"
]
| [
"nonn",
"easy",
"new"
]
| 15 | 0 | 2 | [
"A062383",
"A064235",
"A349593",
"A385552",
"A385553",
"A385554"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-06T10:06:58 | oeisdata/seq/A385/A385554.seq | 30677fa5f71ce46cb7b0019c7355f1dc |
A385555 | Period of {binomial(N,3) mod n: N in Z}. | [
"1",
"4",
"9",
"8",
"5",
"36",
"7",
"16",
"27",
"20",
"11",
"72",
"13",
"28",
"45",
"32",
"17",
"108",
"19",
"40",
"63",
"44",
"23",
"144",
"25",
"52",
"81",
"56",
"29",
"180",
"31",
"64",
"99",
"68",
"35",
"216",
"37",
"76",
"117",
"80",
"41",
"252",
"43",
"88",
"135",
"92",
"47",
"288",
"49",
"100",
"153",
"104",
"53",
"324",
"55",
"112",
"171",
"116",
"59",
"360"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 18 | 1 | 2 | [
"A022998",
"A089128",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:49:23 | oeisdata/seq/A385/A385555.seq | a7c61370d18c31e2da77d6319980007d |
A385556 | Period of {binomial(N,4) mod n: N in Z}. | [
"1",
"8",
"9",
"16",
"5",
"72",
"7",
"32",
"27",
"40",
"11",
"144",
"13",
"56",
"45",
"64",
"17",
"216",
"19",
"80",
"63",
"88",
"23",
"288",
"25",
"104",
"81",
"112",
"29",
"360",
"31",
"128",
"99",
"136",
"35",
"432",
"37",
"152",
"117",
"160",
"41",
"504",
"43",
"176",
"135",
"184",
"47",
"576",
"49",
"200",
"153",
"208",
"53",
"648",
"55",
"224",
"171",
"232",
"59",
"720"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 19 | 1 | 2 | [
"A000034",
"A022998",
"A089128",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:50:34 | oeisdata/seq/A385/A385556.seq | 3339d1935c29d1c21dd2686b73ad9500 |
A385557 | Period of {binomial(N,5) mod n: N in Z}. Also, period of {binomial(N,6) mod n: N in Z}. | [
"1",
"8",
"9",
"16",
"25",
"72",
"7",
"32",
"27",
"200",
"11",
"144",
"13",
"56",
"225",
"64",
"17",
"216",
"19",
"400",
"63",
"88",
"23",
"288",
"125",
"104",
"81",
"112",
"29",
"1800",
"31",
"128",
"99",
"136",
"175",
"432",
"37",
"152",
"117",
"800",
"41",
"504",
"43",
"176",
"675",
"184",
"47",
"576",
"49",
"1000",
"153",
"208",
"53",
"648",
"275",
"224",
"171",
"232",
"59",
"3600"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 19 | 1 | 2 | [
"A022998",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:54:26 | oeisdata/seq/A385/A385557.seq | af6e9ec6087bbb0072bac72a322267c2 |
A385558 | Period of {binomial(N,7) mod n: N in Z}. | [
"1",
"8",
"9",
"16",
"25",
"72",
"49",
"32",
"27",
"200",
"11",
"144",
"13",
"392",
"225",
"64",
"17",
"216",
"19",
"400",
"441",
"88",
"23",
"288",
"125",
"104",
"81",
"784",
"29",
"1800",
"31",
"128",
"99",
"136",
"1225",
"432",
"37",
"152",
"117",
"800",
"41",
"3528",
"43",
"176",
"675",
"184",
"47",
"576",
"343",
"1000",
"153",
"208",
"53",
"648",
"275",
"1568",
"171",
"232",
"59",
"3600"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 18 | 1 | 2 | [
"A022998",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:54:12 | oeisdata/seq/A385/A385558.seq | 588700c565ad38c72bebd6b5048f967c |
A385559 | Period of {binomial(N,8) mod n: N in Z}. | [
"1",
"16",
"9",
"32",
"25",
"144",
"49",
"64",
"27",
"400",
"11",
"288",
"13",
"784",
"225",
"128",
"17",
"432",
"19",
"800",
"441",
"176",
"23",
"576",
"125",
"208",
"81",
"1568",
"29",
"3600",
"31",
"256",
"99",
"272",
"1225",
"864",
"37",
"304",
"117",
"1600",
"41",
"7056",
"43",
"352",
"675",
"368",
"47",
"1152",
"343",
"2000",
"153",
"416",
"53",
"1296",
"275",
"3136",
"171",
"464",
"59",
"7200"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 18 | 1 | 2 | [
"A022998",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:54:39 | oeisdata/seq/A385/A385559.seq | b39588ec7d844971dd4a5c4737ae66c1 |
A385560 | Period of {binomial(N,9) mod n: N in Z}. Also, period of {binomial(N,10) mod n: N in Z}. | [
"1",
"16",
"27",
"32",
"25",
"432",
"49",
"64",
"81",
"400",
"11",
"864",
"13",
"784",
"675",
"128",
"17",
"1296",
"19",
"800",
"1323",
"176",
"23",
"1728",
"125",
"208",
"243",
"1568",
"29",
"10800",
"31",
"256",
"297",
"272",
"1225",
"2592",
"37",
"304",
"351",
"1600",
"41",
"21168",
"43",
"352",
"2025",
"368",
"47",
"3456",
"343",
"2000",
"459",
"416",
"53",
"3888",
"275",
"3136",
"513",
"464",
"59",
"21600"
]
| [
"nonn",
"easy",
"mult",
"new"
]
| 19 | 1 | 2 | [
"A022998",
"A349593",
"A385555",
"A385556",
"A385557",
"A385558",
"A385559",
"A385560"
]
| null | Jianing Song, Jul 03 2025 | 2025-07-07T11:54:50 | oeisdata/seq/A385/A385560.seq | d74a7089b6376237748545ecd119fee5 |
A385561 | Numbers m such that (1/m) * Sum_{k=1..m} phi(k)/k is closer to 6/Pi^2 than it is for any number smaller than m, where phi is the Euler totient function (A000010). | [
"1",
"2",
"3",
"4",
"6",
"10",
"12",
"16",
"22",
"28",
"36",
"66",
"96",
"100",
"126",
"156",
"190",
"330",
"430",
"540",
"820",
"876",
"1086",
"1422",
"10596",
"10836",
"18096",
"35796",
"55786",
"69336",
"111100",
"168666",
"284650",
"905950",
"1482300",
"1745590",
"2405560",
"2661310",
"4023306",
"5869956",
"17454580",
"25670646",
"51305346",
"79969618",
"211025650",
"622626790"
]
| [
"nonn",
"new"
]
| 6 | 1 | 2 | [
"A000010",
"A059956",
"A071708",
"A072155",
"A330899",
"A385561",
"A385562"
]
| null | Amiram Eldar, Jul 03 2025 | 2025-07-05T11:24:59 | oeisdata/seq/A385/A385561.seq | dc358c0d2f47606a206770f940eccb52 |
A385562 | Numbers m such that (1/m) * Sum_{k=1..m} k/phi(k) sets a record value, where phi is the Euler totient function (A000010). | [
"1",
"2",
"4",
"6",
"12",
"18",
"22",
"24",
"30",
"42",
"60",
"66",
"72",
"78",
"84",
"90",
"114",
"120",
"150",
"156",
"180",
"198",
"210",
"300",
"330",
"390",
"420",
"510",
"546",
"570",
"600",
"630",
"750",
"780",
"840",
"966",
"990",
"1122",
"1170",
"1200",
"1260",
"1410",
"1470",
"1560",
"1596",
"1620",
"1650",
"1680",
"1806",
"1830",
"1890",
"1980",
"2100"
]
| [
"nonn",
"new"
]
| 9 | 1 | 2 | [
"A000010",
"A068885",
"A069947",
"A082695",
"A330899",
"A385561",
"A385562"
]
| null | Amiram Eldar, Jul 03 2025 | 2025-07-05T11:25:03 | oeisdata/seq/A385/A385562.seq | ca1447dad0c4730b6aff4e6bdbf59589 |
A385564 | Prime powers k such that lcm(1, 2, 3, ..., k)-1 is prime. | [
"3",
"4",
"5",
"7",
"8",
"19",
"23",
"29",
"32",
"47",
"61",
"97",
"181",
"233",
"307",
"401",
"887",
"1021",
"1087",
"1361",
"1481",
"2053",
"2293",
"5407",
"5857",
"11059",
"14281",
"27277",
"27803",
"36497",
"44987",
"53017"
]
| [
"nonn",
"new"
]
| 23 | 1 | 1 | [
"A000961",
"A003418",
"A051453",
"A057824",
"A057825",
"A154524",
"A385564"
]
| null | Jeppe Stig Nielsen, Jul 03 2025 | 2025-07-09T11:00:52 | oeisdata/seq/A385/A385564.seq | d59b5898033127f3ed7ace52b678bf62 |
A385565 | a(n) is the smallest positive integer k such that the Diophantine equation x^3 + y^3 + z^3 = k^4, where 0 < x < y < z has exactly n integer solutions. | [
"11",
"21",
"64",
"144",
"330",
"846",
"342",
"252",
"1331",
"1008",
"720",
"1890",
"3780",
"729",
"4200",
"2016",
"1000",
"216",
"6300",
"8352",
"10800"
]
| [
"nonn",
"more",
"new"
]
| 11 | 1 | 1 | [
"A024975",
"A025419",
"A377444",
"A385354",
"A385565",
"A385566"
]
| null | Zhining Yang, Jul 03 2025 | 2025-07-08T10:40:31 | oeisdata/seq/A385/A385565.seq | a1461286f4085ccb220cf09728075405 |
A385566 | a(n) is the smallest positive integer k such that the Diophantine equation x^3 + y^3 + z^3 = k^6, where 0 < x < y < z has exactly n integer solutions. | [
"3",
"6",
"16",
"12",
"27",
"63",
"38",
"24",
"94",
"18",
"123",
"42",
"93",
"75",
"141",
"48",
"66",
"36",
"153",
"60",
"140",
"96",
"279",
"114",
"200",
"138",
"410",
"174",
"72",
"126",
"186",
"168",
"204",
"150",
"108",
"426",
"132",
"220",
"418",
"246",
"498",
"736",
"144",
"120",
"294",
"306",
"210",
"666",
"282",
"378",
"252",
"770",
"216",
"460",
"462",
"534",
"180"
]
| [
"nonn",
"new"
]
| 12 | 1 | 1 | [
"A024975",
"A025419",
"A377444",
"A385354",
"A385565",
"A385566"
]
| null | Zhining Yang, Jul 03 2025 | 2025-07-08T11:05:12 | oeisdata/seq/A385/A385566.seq | 1e303a7d889b4f55f3f27dca2d311044 |
A385568 | Decimal expansion of Pi^(3/4). | [
"2",
"3",
"5",
"9",
"7",
"3",
"0",
"4",
"9",
"2",
"4",
"1",
"4",
"6",
"9",
"6",
"8",
"8",
"7",
"5",
"7",
"8",
"4",
"7",
"4",
"4",
"6",
"4",
"5",
"2",
"1",
"9",
"3",
"4",
"4",
"4",
"2",
"4",
"5",
"8",
"0",
"4",
"0",
"5",
"3",
"6",
"9",
"3",
"7",
"8",
"1",
"8",
"4",
"5",
"7",
"2",
"8",
"1",
"9",
"6",
"5",
"9",
"3",
"5",
"3",
"7",
"1",
"5",
"4",
"2",
"1",
"9",
"4",
"1",
"5",
"6",
"1",
"5",
"4",
"8",
"2",
"1",
"4",
"0",
"0",
"7",
"5",
"0",
"0",
"6",
"9",
"7",
"7",
"7",
"2",
"5",
"9",
"1",
"9",
"6",
"2",
"8",
"8",
"3",
"4",
"4",
"6",
"5",
"1",
"1"
]
| [
"nonn",
"cons",
"new"
]
| 13 | 1 | 1 | [
"A092040",
"A175476",
"A196535",
"A385568"
]
| null | Artur Jasinski, Jul 03 2025 | 2025-07-09T00:12:17 | oeisdata/seq/A385/A385568.seq | 9912d4f99345c915abff8fb59de878fd |
A385569 | Decimal expansion of the volume of an augmented hexagonal prism with unit edge. | [
"2",
"8",
"3",
"3",
"7",
"7",
"8",
"4",
"7",
"1",
"7",
"4",
"8",
"8",
"3",
"1",
"7",
"8",
"1",
"7",
"5",
"8",
"1",
"1",
"7",
"6",
"3",
"2",
"9",
"6",
"0",
"4",
"2",
"4",
"8",
"9",
"6",
"8",
"4",
"2",
"4",
"8",
"6",
"5",
"2",
"6",
"6",
"1",
"1",
"7",
"2",
"8",
"9",
"5",
"4",
"2",
"7",
"9",
"8",
"2",
"3",
"7",
"5",
"8",
"8",
"4",
"3",
"0",
"2",
"1",
"6",
"0",
"5",
"1",
"0",
"6",
"8",
"8",
"4",
"5",
"6",
"2",
"0",
"9",
"6",
"7",
"8",
"3",
"8",
"6"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 8 | 1 | 1 | [
"A002193",
"A002194",
"A354129",
"A385505",
"A385506",
"A385509",
"A385569"
]
| null | Paolo Xausa, Jul 03 2025 | 2025-07-03T09:28:57 | oeisdata/seq/A385/A385569.seq | da66cd35233a1b6bc7a09a1693e64293 |
A385571 | Number of subsets of the first n twin primes (A001097) whose sum is a twin prime. | [
"1",
"2",
"3",
"5",
"8",
"13",
"22",
"37",
"64",
"119",
"227",
"450",
"884",
"1673",
"3019",
"5113",
"8877",
"16119",
"30250",
"57282",
"109178",
"210547",
"412261",
"819165",
"1641582",
"3298602",
"6600608",
"13150469",
"26176431",
"52289653",
"104981405",
"210846036",
"420699038",
"828442946",
"1610436120",
"3102364760"
]
| [
"nonn",
"new"
]
| 15 | 1 | 2 | [
"A001097",
"A071810",
"A385571"
]
| null | Ilya Gutkovskiy, Jul 03 2025 | 2025-07-08T18:51:24 | oeisdata/seq/A385/A385571.seq | d5ed2a2ae9a7cfb65794c8710dedc2da |
A385572 | Number of subsets of {1..n} with the same number of maximal runs (increasing by 1) as maximal anti-runs (increasing by more than 1). | [
"1",
"2",
"3",
"4",
"7",
"12",
"19",
"34",
"63",
"112",
"207",
"394",
"739",
"1398",
"2687",
"5152",
"9891",
"19128",
"37039",
"71754",
"139459",
"271522",
"528999",
"1032308",
"2017291",
"3945186",
"7723203",
"15134440",
"29679407",
"58245068",
"114389683",
"224796210",
"442021743",
"869658304",
"1711914351",
"3371515306"
]
| [
"nonn",
"new"
]
| 16 | 0 | 2 | [
"A000071",
"A000079",
"A001629",
"A010027",
"A034839",
"A053538",
"A069010",
"A116674",
"A210034",
"A217615",
"A268193",
"A384175",
"A384176",
"A384177",
"A384877",
"A384878",
"A384879",
"A384881",
"A384889",
"A384890",
"A384893",
"A384905",
"A385572",
"A385575"
]
| null | Gus Wiseman, Jul 04 2025 | 2025-07-07T12:04:33 | oeisdata/seq/A385/A385572.seq | 5bd0594c48c3fde3a44c35e3bc10e8a0 |
A385574 | Number of integer partitions of n with the same number of adjacent equal parts as adjacent unequal parts. | [
"1",
"1",
"1",
"1",
"2",
"3",
"2",
"4",
"5",
"6",
"10",
"11",
"13",
"17",
"20",
"30",
"36",
"44",
"55",
"70",
"86",
"98",
"128",
"156",
"190",
"235",
"288",
"351",
"409",
"499",
"603",
"722",
"863",
"1025",
"1227",
"1461",
"1757",
"2061",
"2444",
"2892",
"3406",
"3996",
"4708",
"5497",
"6430",
"7595",
"8835",
"10294",
"12027",
"13971",
"16252",
"18887",
"21878"
]
| [
"nonn",
"new"
]
| 7 | 0 | 5 | [
"A000009",
"A000041",
"A000071",
"A003114",
"A007690",
"A008284",
"A010027",
"A034296",
"A034839",
"A046660",
"A047966",
"A047993",
"A066311",
"A073491",
"A098859",
"A106529",
"A116608",
"A116674",
"A133121",
"A183558",
"A210034",
"A212165",
"A212168",
"A217615",
"A242882",
"A268193",
"A297155",
"A325324",
"A325325",
"A336866",
"A355394",
"A356236",
"A356606",
"A361204",
"A384881",
"A384882",
"A384885",
"A384893",
"A384905",
"A385572",
"A385574",
"A385575",
"A385576"
]
| null | Gus Wiseman, Jul 04 2025 | 2025-07-05T09:59:47 | oeisdata/seq/A385/A385574.seq | a4e96cb0a7c2651ae720ecc303e71d14 |
A385575 | Numbers whose binary indices have the same number of adjacent parts differing by 1 as adjacent parts differing by more than 1. | [
"1",
"2",
"4",
"8",
"11",
"13",
"16",
"19",
"22",
"25",
"26",
"32",
"35",
"38",
"44",
"49",
"50",
"52",
"64",
"67",
"70",
"76",
"87",
"88",
"91",
"93",
"97",
"98",
"100",
"104",
"107",
"109",
"117",
"128",
"131",
"134",
"140",
"151",
"152",
"155",
"157",
"167",
"174",
"176",
"179",
"182",
"185",
"186",
"193",
"194",
"196",
"200",
"203",
"205",
"208",
"211",
"214",
"217"
]
| [
"nonn",
"new"
]
| 6 | 1 | 2 | [
"A000079",
"A010027",
"A034839",
"A053538",
"A069010",
"A116674",
"A210034",
"A217615",
"A268193",
"A384175",
"A384176",
"A384177",
"A384877",
"A384878",
"A384879",
"A384881",
"A384889",
"A384890",
"A384893",
"A384905",
"A385572",
"A385575"
]
| null | Gus Wiseman, Jul 04 2025 | 2025-07-05T10:00:21 | oeisdata/seq/A385/A385575.seq | b0c2435e68c621ca1f64482494a4cf5b |
A385576 | Numbers whose prime indices have the same number of distinct elements as maximal anti-runs. | [
"1",
"2",
"3",
"5",
"7",
"11",
"12",
"13",
"17",
"18",
"19",
"20",
"23",
"28",
"29",
"31",
"37",
"41",
"43",
"44",
"45",
"47",
"50",
"52",
"53",
"59",
"61",
"63",
"67",
"68",
"71",
"73",
"75",
"76",
"79",
"83",
"89",
"92",
"97",
"98",
"99",
"101",
"103",
"107",
"109",
"113",
"116",
"117",
"120",
"124",
"127",
"131",
"137",
"139",
"147",
"148",
"149",
"151",
"153",
"157",
"163"
]
| [
"nonn",
"new"
]
| 8 | 1 | 2 | [
"A001221",
"A034296",
"A044813",
"A046660",
"A047993",
"A066311",
"A073491",
"A106529",
"A116608",
"A133121",
"A210034",
"A268193",
"A297155",
"A356226",
"A356235",
"A356237",
"A361205",
"A375136",
"A384877",
"A384878",
"A384889",
"A384893",
"A384905",
"A385213",
"A385572",
"A385574",
"A385575",
"A385576"
]
| null | Gus Wiseman, Jul 04 2025 | 2025-07-05T09:59:39 | oeisdata/seq/A385/A385576.seq | 235a2ad0e98a942740ade6499548c16e |
A385577 | Array read by ascending antidiagonals: A(n,m) = n*Pochhammer(n+1,m+1)/(m+2). | [
"0",
"1",
"0",
"3",
"2",
"0",
"6",
"8",
"6",
"0",
"10",
"20",
"30",
"24",
"0",
"15",
"40",
"90",
"144",
"120",
"0",
"21",
"70",
"210",
"504",
"840",
"720",
"0",
"28",
"112",
"420",
"1344",
"3360",
"5760",
"5040",
"0",
"36",
"168",
"756",
"3024",
"10080",
"25920",
"45360",
"40320",
"0",
"45",
"240",
"1260",
"6048",
"25200",
"86400",
"226800",
"403200",
"362880",
"0"
]
| [
"nonn",
"easy",
"tabl",
"new"
]
| 7 | 0 | 4 | [
"A000004",
"A000142",
"A000217",
"A001048",
"A002740",
"A006231",
"A007290",
"A033487",
"A068424",
"A158874",
"A238474",
"A385577"
]
| null | Stefano Spezia, Jul 03 2025 | 2025-07-07T00:41:46 | oeisdata/seq/A385/A385577.seq | 387c4d376aa27af925a6647c7b364a03 |
A385578 | Decimal expansion of the volume of a parabiaugmented hexagonal prism with unit edge. | [
"3",
"0",
"6",
"9",
"4",
"8",
"0",
"7",
"3",
"2",
"1",
"4",
"4",
"3",
"4",
"7",
"6",
"2",
"3",
"2",
"2",
"5",
"0",
"6",
"5",
"7",
"5",
"3",
"6",
"6",
"2",
"0",
"4",
"1",
"2",
"4",
"3",
"2",
"7",
"0",
"7",
"6",
"5",
"1",
"7",
"2",
"5",
"0",
"7",
"8",
"8",
"6",
"9",
"6",
"6",
"4",
"7",
"5",
"9",
"3",
"7",
"0",
"4",
"8",
"5",
"0",
"8",
"1",
"4",
"3",
"6",
"8",
"4",
"8",
"5",
"0",
"5",
"6",
"9",
"0",
"6",
"8",
"5",
"7",
"1",
"8",
"4",
"8",
"4",
"5"
]
| [
"nonn",
"cons",
"easy",
"new"
]
| 6 | 1 | 1 | [
"A002194",
"A010466",
"A104956",
"A131594",
"A385257",
"A385569",
"A385578"
]
| null | Paolo Xausa, Jul 04 2025 | 2025-07-05T11:25:17 | oeisdata/seq/A385/A385578.seq | ed20619dd536672b7b8e50f5e49ddf13 |
A385579 | Smallest prime factor that the repunit(n) = (10^n-1)/9 shares with at least one other binary vector of the same length in base 10, or 1 if they are coprime. | [
"1",
"1",
"1",
"1",
"11",
"1",
"3",
"1",
"11",
"3",
"11",
"1",
"3",
"53",
"11",
"3",
"11",
"1",
"3",
"1",
"11",
"3",
"11",
"1",
"3",
"41",
"11",
"3",
"11",
"3191",
"3",
"2791",
"11",
"3",
"11",
"41",
"3",
"2028119",
"11",
"3",
"11",
"83",
"3",
"173",
"11",
"3",
"11",
"35121409",
"3",
"239",
"11",
"3",
"11",
"107",
"3",
"41",
"11",
"3",
"11"
]
| [
"nonn",
"base",
"more",
"new"
]
| 13 | 0 | 5 | [
"A003020",
"A067063",
"A378761",
"A385537",
"A385539",
"A385579"
]
| null | Dmytro Inosov, Jul 03 2025 | 2025-07-07T19:34:22 | oeisdata/seq/A385/A385579.seq | e5ebdbc932742a442dc509a3c47155e8 |
A385581 | Square array read by antidiagonals: T(n,d) is the number of fixed d-dimensional polysticks of size n. | [
"1",
"2",
"1",
"3",
"6",
"1",
"4",
"15",
"22",
"1",
"5",
"28",
"95",
"88",
"1",
"6",
"45",
"252",
"681",
"372",
"1",
"7",
"66",
"525",
"2600",
"5277",
"1628",
"1",
"8",
"91",
"946",
"7065",
"29248",
"43086",
"7312",
"1",
"9",
"120",
"1547",
"15696",
"104097",
"349132",
"365313",
"33466",
"1",
"10",
"153",
"2360",
"30513",
"285828",
"1632915",
"4351944",
"3186444",
"155446",
"1"
]
| [
"nonn",
"tabl",
"new"
]
| 8 | 1 | 2 | [
"A000384",
"A096267",
"A365560",
"A365562",
"A365564",
"A385291",
"A385581",
"A385582",
"A385583"
]
| null | Pontus von Brömssen, Jul 04 2025 | 2025-07-06T11:33:41 | oeisdata/seq/A385/A385581.seq | f65c1f63efbe3bd8e0723b9b21fbb664 |
A385582 | Triangle read by rows: T(n,d) is the number of fixed, properly d-dimensional polysticks of size n. | [
"1",
"1",
"4",
"1",
"20",
"32",
"1",
"86",
"420",
"400",
"1",
"370",
"4164",
"10368",
"6912",
"1",
"1626",
"38205",
"186552",
"301840",
"153664",
"1",
"7310",
"343380",
"2934560",
"8637760",
"10223616",
"4194304",
"1",
"33464",
"3086049",
"43517697",
"207353960",
"427708848",
"396809280",
"136048896"
]
| [
"nonn",
"tabl",
"new"
]
| 8 | 1 | 3 | [
"A127670",
"A195739",
"A365566",
"A385581",
"A385582"
]
| null | Pontus von Brömssen, Jul 04 2025 | 2025-07-06T11:33:30 | oeisdata/seq/A385/A385582.seq | 20e70f182deb362512cc23756cdeb2f7 |
A385583 | Triangle read by rows: T(n,d) is the number of free d-dimensional polysticks of size n. | [
"1",
"1",
"2",
"1",
"5",
"7",
"1",
"16",
"28",
"31",
"1",
"55",
"160",
"199",
"205",
"1",
"222",
"1085",
"1651",
"1768",
"1779"
]
| [
"nonn",
"tabl",
"more",
"new"
]
| 6 | 1 | 3 | [
"A019988",
"A330891",
"A365559",
"A365561",
"A365563",
"A365565",
"A365566",
"A385581",
"A385583"
]
| null | Pontus von Brömssen, Jul 04 2025 | 2025-07-06T11:33:35 | oeisdata/seq/A385/A385583.seq | 04dc79768152bd8ec7bf5e77752bdfb9 |
A385584 | a(n) is the number of pairs (p, t) such that p is a pyramidal number, t is a triangular number, p + t <= n and t <= p. | [
"1",
"2",
"3",
"3",
"4",
"5",
"5",
"6",
"6",
"6",
"7",
"8",
"8",
"9",
"9",
"9",
"10",
"10",
"10",
"10",
"12",
"13",
"13",
"14",
"14",
"14",
"15",
"15",
"15",
"15",
"16",
"16",
"16",
"16",
"16",
"18",
"19",
"19",
"20",
"20",
"20",
"21",
"21",
"21",
"21",
"22",
"22",
"22",
"22",
"22",
"23",
"23",
"23",
"23",
"23",
"23",
"25",
"26",
"26",
"27",
"27",
"27",
"28",
"29",
"29",
"29",
"30",
"30",
"30",
"30",
"30",
"31",
"31",
"31"
]
| [
"nonn",
"new"
]
| 30 | 0 | 2 | [
"A000217",
"A000292",
"A001399",
"A001477",
"A027568",
"A385584"
]
| null | Robert G. Wilson v, Jul 03 2025 | 2025-07-10T14:30:54 | oeisdata/seq/A385/A385584.seq | 1002eec96f43b4d00f2703c7c46eb331 |
A385585 | G.f. A(x) satisfies A(x) = Sum_{k>=0} (k*x)^k * A(k*x). | [
"1",
"1",
"5",
"40",
"457",
"7101",
"148270",
"4206121",
"165267951",
"9117777074",
"709325010385",
"77906424970811",
"12109278363587036",
"2670187179684919761",
"836451775445907622685",
"372646977140600929476104",
"236390047765997660237447061",
"213719117789650238860723125601"
]
| [
"nonn",
"new"
]
| 10 | 0 | 3 | [
"A125282",
"A218683",
"A385544",
"A385585"
]
| null | Seiichi Manyama, Jul 03 2025 | 2025-07-04T04:45:21 | oeisdata/seq/A385/A385585.seq | e1f6e6b42ecdf512b72a8728cabd4340 |
A385586 | Primes p such that there exists prime q < p such that sigma(p+1) = sigma(q+1) = p + q. | [
"37",
"34687",
"65587",
"2089951",
"8161477",
"8340613",
"18927067",
"25855567",
"64346413",
"95150203",
"238973101",
"257658061",
"277743397",
"322210813",
"349883707",
"578403913",
"704710543",
"1121445337",
"1654635937",
"1741780693",
"1804380007",
"1963734061",
"2346701941",
"2360966173",
"2720420707",
"3232299517",
"4343250181",
"4925742973",
"8085909913",
"9044601133"
]
| [
"nonn",
"new"
]
| 27 | 1 | 1 | [
"A000040",
"A000203",
"A008333",
"A063990",
"A259180",
"A385586",
"A385705",
"A385718"
]
| null | S. I. Dimitrov, Jul 03 2025 | 2025-07-08T07:49:25 | oeisdata/seq/A385/A385586.seq | f0b8f863d3730624de45871575ce897c |
A385587 | Galileo sequence with ratio k = 4: a(1) = 1, a(2) = k, a(2*n-1) = floor(((k + 1)*a(n) -1)/2), and a(2*n) = floor((k + 1)*a(n)/2) + 1 for n > 2. | [
"1",
"4",
"9",
"11",
"22",
"23",
"27",
"28",
"54",
"56",
"57",
"58",
"67",
"68",
"69",
"71",
"134",
"136",
"139",
"141",
"142",
"143",
"144",
"146",
"167",
"168",
"169",
"171",
"172",
"173",
"177",
"178",
"334",
"336",
"339",
"341",
"347",
"348",
"352",
"353",
"354",
"356",
"357",
"358",
"359",
"361",
"364",
"366",
"417",
"418",
"419",
"421",
"422",
"423",
"427",
"428",
"429"
]
| [
"nonn",
"easy",
"look",
"new"
]
| 15 | 1 | 2 | [
"A005408",
"A037861",
"A385587",
"A385610",
"A385643"
]
| null | Stefano Spezia, Jul 03 2025 | 2025-07-09T18:57:41 | oeisdata/seq/A385/A385587.seq | e23e4cfaebb767eccfa6291d460d9a05 |
A385589 | a(n) = 2^(n-2)*(3*binomial(n,3) + 6*binomial(n,2) + 6*n + 4). | [
"1",
"5",
"22",
"86",
"304",
"992",
"3040",
"8864",
"24832",
"67328",
"177664",
"458240",
"1159168",
"2883584",
"7069696",
"17113088",
"40960000",
"97058816",
"227934208",
"530972672",
"1227882496",
"2820669440",
"6440353792",
"14623440896",
"33034338304",
"74272735232",
"166262210560",
"370675810304",
"823291543552",
"1822139875328"
]
| [
"nonn",
"easy",
"new"
]
| 8 | 0 | 2 | [
"A385407",
"A385589"
]
| null | Enrique Navarrete, Jul 03 2025 | 2025-07-07T18:16:36 | oeisdata/seq/A385/A385589.seq | 4e77ddb1fe9a97fa52edacecf3ede95f |
A385590 | Triangle read by rows, based on Fibonacci numbers: Let i > 1 be such that F(i) <= n < F(i+1); i.e., i = A130233(n). Then T(n, k) = F(i-1)^2 + 1 - (i-1) mod 2 + (n - F(i)) * F(i-2) + (k-1) * F(i-1) where F(k) = A000045(k). | [
"1",
"2",
"3",
"4",
"6",
"8",
"5",
"7",
"9",
"11",
"10",
"13",
"16",
"19",
"22",
"12",
"15",
"18",
"21",
"24",
"27",
"14",
"17",
"20",
"23",
"26",
"29",
"32",
"25",
"30",
"35",
"40",
"45",
"50",
"55",
"60",
"28",
"33",
"38",
"43",
"48",
"53",
"58",
"63",
"68",
"31",
"36",
"41",
"46",
"51",
"56",
"61",
"66",
"71",
"76",
"34",
"39",
"44",
"49",
"54",
"59",
"64",
"69",
"74",
"79",
"84",
"37",
"42",
"47",
"52",
"57",
"62",
"67",
"72",
"77",
"82",
"87",
"92",
"65",
"73",
"81",
"89",
"97"
]
| [
"nonn",
"easy",
"tabl",
"new"
]
| 7 | 1 | 2 | [
"A000045",
"A130233",
"A385590"
]
| null | Werner Schulte, Jul 03 2025 | 2025-07-07T20:01:36 | oeisdata/seq/A385/A385590.seq | b4f47b00237be2473bd1127d93e7fd98 |
A385592 | Values of u in the quartets (2,u,v,w); i.e., values of u for solutions to 2*(2+u) = v*(v+w), in positive integers, with and v>m, sorted by nondecreasing values of u; see Comments. | [
"4",
"7",
"8",
"10",
"10",
"12",
"13",
"13",
"14",
"16",
"16",
"18",
"18",
"19",
"19",
"20",
"22",
"22",
"22",
"23",
"24",
"25",
"25",
"26",
"26",
"28",
"28",
"28",
"28",
"30",
"31",
"31",
"32",
"33",
"33",
"34",
"34",
"34",
"34",
"36",
"37",
"37",
"38",
"38",
"38",
"40",
"40",
"40",
"40",
"42",
"42",
"43",
"43",
"43",
"43",
"44",
"46",
"46",
"46",
"46",
"47",
"48",
"48",
"49",
"49"
]
| [
"nonn",
"new"
]
| 19 | 1 | 1 | [
"A385182",
"A385592",
"A385593",
"A385594"
]
| null | Clark Kimberling, Jul 04 2025 | 2025-07-11T01:13:21 | oeisdata/seq/A385/A385592.seq | 719ca19d1b0888fcd1dc72443ebcc3c6 |
A385593 | The v sequence in quartets (2,u,v,w); see A385592. | [
"3",
"3",
"4",
"3",
"4",
"4",
"3",
"5",
"4",
"3",
"4",
"4",
"5",
"3",
"6",
"4",
"3",
"4",
"6",
"5",
"4",
"3",
"6",
"4",
"7",
"3",
"4",
"5",
"6",
"4",
"3",
"6",
"4",
"5",
"7",
"3",
"4",
"6",
"8",
"4",
"3",
"6",
"4",
"5",
"8",
"3",
"4",
"6",
"7",
"4",
"8",
"3",
"5",
"6",
"9",
"4",
"3",
"4",
"6",
"8",
"7",
"4",
"5",
"3",
"6",
"4",
"8",
"3",
"4",
"6",
"9",
"5",
"10",
"4",
"7",
"8",
"3",
"6",
"4",
"3",
"4",
"5",
"6",
"8",
"10",
"4"
]
| [
"nonn",
"new"
]
| 6 | 1 | 1 | [
"A385182",
"A385592",
"A385593",
"A385594"
]
| null | Clark Kimberling, Jul 04 2025 | 2025-07-10T00:43:23 | oeisdata/seq/A385/A385593.seq | 7934cbd187fac3543bc820fc0ec62de0 |
A385594 | The w sequence in quartets (2,u,v,w); see A385592. | [
"1",
"3",
"1",
"5",
"2",
"3",
"7",
"1",
"4",
"9",
"5",
"6",
"3",
"11",
"1",
"7",
"13",
"8",
"2",
"5",
"9",
"15",
"3",
"10",
"1",
"17",
"11",
"7",
"4",
"12",
"19",
"5",
"13",
"9",
"3",
"21",
"14",
"6",
"1",
"15",
"23",
"7",
"16",
"11",
"2",
"25",
"17",
"8",
"5",
"18",
"3",
"27",
"13",
"9",
"1",
"19",
"29",
"20",
"10",
"4",
"7",
"21",
"15",
"31",
"11",
"22",
"5",
"33",
"23",
"12",
"3",
"17",
"1",
"24",
"9"
]
| [
"nonn",
"new"
]
| 4 | 1 | 2 | [
"A385182",
"A385592",
"A385593",
"A385594"
]
| null | Clark Kimberling, Jul 07 2025 | 2025-07-10T00:43:54 | oeisdata/seq/A385/A385594.seq | 0dbf53aac95247542f2e70ddb62abe8b |
A385595 | The u sequence in quartets (3,u,v,w); i.e., values of u for solutions to 3*(3+u) = v*(v+w), in positive integers, with u,v>=3 and u>=m, sorted by nondecreasing values of u; see Comments. | [
"5",
"7",
"9",
"11",
"12",
"13",
"13",
"15",
"17",
"17",
"17",
"18",
"19",
"21",
"21",
"21",
"22",
"23",
"25",
"25",
"25",
"27",
"27",
"27",
"29",
"29",
"29",
"30",
"31",
"32",
"32",
"33",
"33",
"33",
"35",
"36",
"37",
"37",
"37",
"37",
"37",
"39",
"39",
"39",
"41",
"41",
"41",
"42",
"42",
"43",
"45",
"45",
"45",
"45",
"46",
"47",
"47",
"47",
"48",
"49",
"49",
"49",
"51",
"51",
"52"
]
| [
"nonn",
"new"
]
| 8 | 1 | 1 | [
"A385182",
"A385592",
"A385595",
"A385596",
"A385597"
]
| null | Clark Kimberling, Jul 07 2025 | 2025-07-11T01:12:56 | oeisdata/seq/A385/A385595.seq | b0f2f83a6b380b212a3dd45d38970b58 |
A385597 | The w sequence in quartets (3,u,v,w); see A385595. | [
"2",
"1",
"5",
"1",
"4",
"8",
"2",
"3",
"11",
"7",
"4",
"2",
"5",
"14",
"6",
"1",
"10",
"7",
"17",
"8",
"5",
"13",
"9",
"1",
"20",
"10",
"4",
"2",
"11",
"16",
"8",
"23",
"12",
"3",
"13",
"4",
"26",
"19",
"14",
"7",
"2",
"15",
"11",
"5",
"29",
"16",
"1",
"22",
"6",
"17",
"32",
"18",
"10",
"7",
"14",
"25",
"19",
"5",
"8",
"35",
"20",
"1",
"21",
"9",
"28",
"4",
"38",
"22",
"17",
"13",
"2",
"10",
"23",
"41"
]
| [
"nonn",
"new"
]
| 4 | 1 | 1 | [
"A385182",
"A385595",
"A385597"
]
| null | Clark Kimberling, Jul 10 2025 | 2025-07-12T18:52:36 | oeisdata/seq/A385/A385597.seq | 2785b1b11c973cdffa1e9a5bc48ff9e5 |
A385598 | The u sequence in quartets (4,u,v,w); i.e., values of u for solutions to 4(4+u) = v(v+w), in positive integers, v>m, sorted by nondecreasing values of u; see Comments. | [
"6",
"8",
"10",
"11",
"11",
"14",
"14",
"16",
"16",
"17",
"17",
"18",
"20",
"20",
"21",
"22",
"23",
"23",
"24",
"24",
"26",
"26",
"26",
"26",
"28",
"29",
"29",
"30",
"31",
"31",
"31",
"32",
"32",
"32",
"34",
"35",
"35",
"36",
"36",
"36",
"38",
"38",
"38",
"38",
"40",
"40",
"41",
"41",
"41",
"41",
"41",
"42",
"44",
"44",
"44",
"45",
"46",
"46",
"46",
"47",
"47",
"48",
"48",
"50",
"50"
]
| [
"nonn",
"new"
]
| 5 | 1 | 1 | [
"A385182",
"A385592",
"A385598",
"A385599",
"A385600"
]
| null | Clark Kimberling, Jul 10 2025 | 2025-07-12T18:53:22 | oeisdata/seq/A385/A385598.seq | 37a3e58201d6b199214637c35845b846 |
A385599 | The v sequence in quartets (4,u,v,w); see A385182. | [
"5",
"6",
"7",
"5",
"6",
"6",
"8",
"5",
"8",
"6",
"7",
"8",
"6",
"8",
"5",
"8",
"6",
"9",
"7",
"8",
"5",
"6",
"8",
"10",
"8",
"6",
"11",
"8",
"5",
"7",
"10",
"6",
"8",
"9",
"8",
"6",
"12",
"5",
"8",
"10",
"6",
"7",
"8",
"12",
"8",
"11",
"5",
"6",
"9",
"10",
"12",
"8",
"6",
"8",
"12",
"7",
"5",
"8",
"10",
"6",
"12",
"8",
"13",
"6",
"8",
"9",
"12",
"5",
"10",
"11",
"7",
"8",
"14",
"6",
"12",
"8",
"5",
"6",
"8",
"10"
]
| [
"nonn",
"new"
]
| 4 | 1 | 1 | [
"A385182",
"A385598",
"A385599"
]
| null | Clark Kimberling, Jul 12 2025 | 2025-07-13T19:20:10 | oeisdata/seq/A385/A385599.seq | 1be3f16f89fbb45c0c8d7f31426adf0c |
A385600 | The w sequence in quartets (4,u,v,w); see A385182. | [
"3",
"2",
"1",
"7",
"4",
"6",
"1",
"11",
"2",
"8",
"5",
"3",
"10",
"4",
"15",
"5",
"12",
"3",
"9",
"6",
"19",
"14",
"7",
"2",
"8",
"16",
"1",
"9",
"23",
"13",
"4",
"18",
"10",
"7",
"11",
"20",
"1",
"27",
"12",
"6",
"22",
"17",
"13",
"2",
"14",
"5",
"31",
"24",
"11",
"8",
"3",
"15",
"26",
"16",
"4",
"21",
"35",
"17",
"10",
"28",
"5",
"18",
"3",
"30",
"19",
"15",
"6",
"39",
"12",
"9",
"25",
"20",
"2"
]
| [
"nonn",
"new"
]
| 4 | 1 | 1 | [
"A385182",
"A385598",
"A385600"
]
| null | Clark Kimberling, Jul 12 2025 | 2025-07-13T19:20:37 | oeisdata/seq/A385/A385600.seq | 3358f69f19cb2191ae148119b4177e22 |
A385601 | Expansion of e.g.f. cosh(x)^2*(x+x^2/2). | [
"0",
"1",
"1",
"6",
"12",
"40",
"120",
"224",
"896",
"1152",
"5760",
"5632",
"33792",
"26624",
"186368",
"122880",
"983040",
"557056",
"5013504",
"2490368",
"24903680",
"11010048",
"121110528",
"48234496",
"578813952",
"209715200",
"2726297600",
"905969664",
"12683575296",
"3892314112",
"58384711680",
"16642998272",
"266287972352",
"70866960384"
]
| [
"nonn",
"easy",
"new"
]
| 7 | 0 | 4 | [
"A229580",
"A229679",
"A385083",
"A385601"
]
| null | Enrique Navarrete, Jul 04 2025 | 2025-07-08T18:35:15 | oeisdata/seq/A385/A385601.seq | 03795de2411dd5685766c53438ac9175 |
A385606 | Diagonal of the rational function 1/(1 - (v^3 + w^3 + x^3 + y^3 + z^3 + v*w*x*y*z)). | [
"1",
"1",
"1",
"121",
"721",
"2521",
"120121",
"1262521",
"7514641",
"200655841",
"2804296441",
"23211542641",
"443673670441",
"7070369866561",
"73192033638361",
"1173608444069881",
"19482750854113681",
"235115468646608881",
"3483568444035458401",
"57574418930692099801",
"769737183831483390601",
"11118980118960559362001"
]
| [
"nonn",
"new"
]
| 8 | 0 | 4 | [
"A082489",
"A361636",
"A361703",
"A385606",
"A385607"
]
| null | Seiichi Manyama, Jul 04 2025 | 2025-07-04T10:04:51 | oeisdata/seq/A385/A385606.seq | cb1defd32e57e0ed089b2bd134986807 |
A385607 | Diagonal of the rational function 1/(1 - (v^2 + w^2 + x^2 + y^2 + z^2 + v*w*x*y*z)). | [
"1",
"1",
"121",
"721",
"115921",
"1254121",
"175667521",
"2723150641",
"328524651841",
"6553910658241",
"694593264839761",
"16751100559753561",
"1592929589394223081",
"44555491032952142881",
"3872288533662063462481",
"121957120480085202781681",
"9836937778718128127534881",
"341177468192261294809070401"
]
| [
"nonn",
"new"
]
| 8 | 0 | 3 | [
"A082489",
"A361636",
"A361703",
"A385606",
"A385607"
]
| null | Seiichi Manyama, Jul 04 2025 | 2025-07-04T10:04:47 | oeisdata/seq/A385/A385607.seq | 6093b57dd815d32b0cc49d4735984d38 |
A385608 | a(n) = 2-adic valuation of A003266(n). | [
"0",
"0",
"0",
"1",
"1",
"1",
"4",
"4",
"4",
"5",
"5",
"5",
"9",
"9",
"9",
"10",
"10",
"10",
"13",
"13",
"13",
"14",
"14",
"14",
"19",
"19",
"19",
"20",
"20",
"20",
"23",
"23",
"23",
"24",
"24",
"24",
"28",
"28",
"28",
"29",
"29",
"29",
"32",
"32",
"32",
"33",
"33",
"33",
"39",
"39",
"39",
"40",
"40",
"40",
"43",
"43",
"43",
"44",
"44",
"44",
"48",
"48",
"48",
"49",
"49",
"49",
"52",
"52",
"52",
"53",
"53",
"53"
]
| [
"nonn",
"easy",
"new"
]
| 25 | 0 | 7 | [
"A000120",
"A003266",
"A007814",
"A337923",
"A385458",
"A385608",
"A385609"
]
| null | Paolo Xausa, Jul 04 2025 | 2025-07-06T05:09:22 | oeisdata/seq/A385/A385608.seq | df81447f4714723c313a7dc9b2100e15 |
A385609 | Partial sums of A090740. | [
"1",
"4",
"5",
"9",
"10",
"13",
"14",
"19",
"20",
"23",
"24",
"28",
"29",
"32",
"33",
"39",
"40",
"43",
"44",
"48",
"49",
"52",
"53",
"58",
"59",
"62",
"63",
"67",
"68",
"71",
"72",
"79",
"80",
"83",
"84",
"88",
"89",
"92",
"93",
"98",
"99",
"102",
"103",
"107",
"108",
"111",
"112",
"118",
"119",
"122",
"123",
"127",
"128",
"131",
"132",
"137",
"138",
"141",
"142",
"146",
"147",
"150",
"151"
]
| [
"nonn",
"easy",
"new"
]
| 9 | 1 | 2 | [
"A000120",
"A090740",
"A385608",
"A385609"
]
| null | Paolo Xausa, Jul 04 2025 | 2025-07-05T11:24:45 | oeisdata/seq/A385/A385609.seq | 943b5437b380b7de573e3184aeacce22 |
A385610 | Galileo sequence with ratio k = 2: a(1) = 1, a(2) = k, a(2*n-1) = floor(((k + 1)*a(n) -1)/2), and a(2*n) = floor((k + 1)*a(n)/2) + 1 for n > 2. | [
"1",
"2",
"2",
"4",
"2",
"4",
"5",
"7",
"2",
"4",
"5",
"7",
"7",
"8",
"10",
"11",
"2",
"4",
"5",
"7",
"7",
"8",
"10",
"11",
"10",
"11",
"11",
"13",
"14",
"16",
"16",
"17",
"2",
"4",
"5",
"7",
"7",
"8",
"10",
"11",
"10",
"11",
"11",
"13",
"14",
"16",
"16",
"17",
"14",
"16",
"16",
"17",
"16",
"17",
"19",
"20",
"20",
"22",
"23",
"25",
"23",
"25",
"25",
"26",
"2",
"4",
"5",
"7",
"7",
"8",
"10",
"11",
"10",
"11"
]
| [
"nonn",
"easy",
"look",
"new"
]
| 11 | 1 | 2 | [
"A005408",
"A037861",
"A385587",
"A385610",
"A385643"
]
| null | Stefano Spezia, Jul 04 2025 | 2025-07-09T18:57:52 | oeisdata/seq/A385/A385610.seq | 66e5d28b8cdc2a0cebb106862aea7654 |
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