sequence_id
stringlengths 7
7
| sequence_name
stringlengths 4
573
| sequence
listlengths 1
348
| keywords
listlengths 1
8
| score
int64 1
2.35k
| offset_a
int64 -14,827
666,262,453B
| offset_b
int64 0
635M
⌀ | cross_references
listlengths 1
128
⌀ | former_ids
listlengths 1
3
⌀ | author
stringlengths 7
231
⌀ | timestamp
timestamp[us]date 1999-12-11 03:00:00
2025-07-19 00:40:46
| filename
stringlengths 29
29
| hash
stringlengths 32
32
|
---|---|---|---|---|---|---|---|---|---|---|---|---|
A014201
|
Number of solutions to x^2 + x*y + y^2 <= n excluding (0,0).
|
[
"0",
"6",
"6",
"12",
"18",
"18",
"18",
"30",
"30",
"36",
"36",
"36",
"42",
"54",
"54",
"54",
"60",
"60",
"60",
"72",
"72",
"84",
"84",
"84",
"84",
"90",
"90",
"96",
"108",
"108",
"108",
"120",
"120",
"120",
"120",
"120",
"126",
"138",
"138",
"150",
"150",
"150",
"150",
"162",
"162",
"162",
"162",
"162",
"168"
] |
[
"nonn",
"easy"
] | 28 | 0 | 2 |
[
"A014198",
"A014201",
"A014202"
] | null |
N. J. A. Sloane
| 2024-08-06T05:28:24 |
oeisdata/seq/A014/A014201.seq
|
ceb75ba97266493492efb3c1ea48fd14
|
A014202
|
Number of solutions to x^2 + x*y + y^2 <= n, excluding (0,0), divided by 6.
|
[
"0",
"1",
"1",
"2",
"3",
"3",
"3",
"5",
"5",
"6",
"6",
"6",
"7",
"9",
"9",
"9",
"10",
"10",
"10",
"12",
"12",
"14",
"14",
"14",
"14",
"15",
"15",
"16",
"18",
"18",
"18",
"20",
"20",
"20",
"20",
"20",
"21",
"23",
"23",
"25",
"25",
"25",
"25",
"27",
"27",
"27",
"27",
"27",
"28",
"31",
"31",
"31",
"33",
"33",
"33",
"33",
"33",
"35",
"35",
"35"
] |
[
"nonn",
"easy"
] | 10 | 0 | 4 |
[
"A014200",
"A014201",
"A014202"
] | null |
N. J. A. Sloane
| 2018-01-29T02:49:16 |
oeisdata/seq/A014/A014202.seq
|
9605ce7db40799b5d9c22f7d38e49967
|
A014203
|
a(n) = Sum_{i,j,k in Z and i^2 + j^2 + k^2 <= n} i^2 + j^2 + k^2.
|
[
"0",
"6",
"30",
"54",
"78",
"198",
"342",
"342",
"438",
"708",
"948",
"1212",
"1308",
"1620",
"2292",
"2292",
"2388",
"3204",
"3852",
"4308",
"4788",
"5796",
"6324",
"6324",
"6900",
"7650",
"9522",
"10386",
"10386",
"12474",
"13914",
"13914",
"14298",
"15882",
"17514",
"19194",
"20274",
"21162",
"23898",
"23898",
"24858",
"28794",
"30810",
"31842",
"32898",
"36138",
"38346",
"38346"
] |
[
"nonn"
] | 20 | 0 | 2 |
[
"A000122",
"A005875",
"A014203"
] | null |
E.V. Flynn (evflynn(AT)liverpool.ac.uk)
| 2025-07-02T16:01:55 |
oeisdata/seq/A014/A014203.seq
|
ce17351b997d1de5203d702fb22faf3b
|
A014204
|
Inverse of 195th cyclotomic polynomial.
|
[
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"1",
"0",
"-1",
"1",
"-1",
"0",
"1",
"-1",
"0",
"0",
"0",
"0",
"-1",
"1",
"0"
] |
[
"sign",
"easy"
] | 12 | 0 | 1 |
[
"A014204",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T14:41:02 |
oeisdata/seq/A014/A014204.seq
|
a7edc2e03941c298cb8cce35bffa8eaf
|
A014205
|
(1/12)*(n+5)*(n+1)*n^2.
|
[
"0",
"1",
"7",
"24",
"60",
"125",
"231",
"392",
"624",
"945",
"1375",
"1936",
"2652",
"3549",
"4655",
"6000",
"7616",
"9537",
"11799",
"14440",
"17500",
"21021",
"25047",
"29624",
"34800",
"40625",
"47151",
"54432",
"62524",
"71485",
"81375",
"92256",
"104192",
"117249",
"131495",
"147000",
"163836",
"182077",
"201799",
"223080",
"246000"
] |
[
"nonn",
"easy",
"changed"
] | 35 | 0 | 3 |
[
"A014205",
"A084990"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:10 |
oeisdata/seq/A014/A014205.seq
|
4fbc2f1bbafa250ddf135a0493af20b0
|
A014206
|
a(n) = n^2 + n + 2.
|
[
"2",
"4",
"8",
"14",
"22",
"32",
"44",
"58",
"74",
"92",
"112",
"134",
"158",
"184",
"212",
"242",
"274",
"308",
"344",
"382",
"422",
"464",
"508",
"554",
"602",
"652",
"704",
"758",
"814",
"872",
"932",
"994",
"1058",
"1124",
"1192",
"1262",
"1334",
"1408",
"1484",
"1562",
"1642",
"1724",
"1808",
"1894",
"1982",
"2072",
"2164",
"2258",
"2354",
"2452",
"2552"
] |
[
"nonn",
"easy",
"nice"
] | 192 | 0 | 1 |
[
"A000124",
"A002061",
"A002522",
"A003682",
"A014206",
"A033547",
"A046127",
"A051890",
"A059173",
"A059174",
"A059250",
"A160450",
"A160457",
"A200182",
"A241119",
"A347570"
] | null |
N. J. A. Sloane
| 2025-02-16T08:32:33 |
oeisdata/seq/A014/A014206.seq
|
d6d5e05871c145a99214b4d330d62a0e
|
A014207
|
Inverse of 198th cyclotomic polynomial.
|
[
"1",
"0",
"0",
"-1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"-1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 14 | 0 | 1 |
[
"A014207",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T14:41:52 |
oeisdata/seq/A014/A014207.seq
|
08e694bf116054d2f05ab8164dedb6ae
|
A014208
|
Next prime after n-th Fibonacci number.
|
[
"2",
"2",
"2",
"3",
"5",
"7",
"11",
"17",
"23",
"37",
"59",
"97",
"149",
"239",
"379",
"613",
"991",
"1601",
"2591",
"4201",
"6779",
"10949",
"17713",
"28661",
"46381",
"75029",
"121403",
"196429",
"317827",
"514243",
"832063",
"1346273",
"2178313",
"3524603",
"5702897",
"9227479"
] |
[
"nonn",
"changed"
] | 10 | 0 | 1 | null | null |
N. J. A. Sloane
| 2025-07-08T02:55:18 |
oeisdata/seq/A014/A014208.seq
|
a1bd62bf47e8731520f4160045e356ea
|
A014209
|
a(n) = n^2 + 3*n - 1.
|
[
"-1",
"3",
"9",
"17",
"27",
"39",
"53",
"69",
"87",
"107",
"129",
"153",
"179",
"207",
"237",
"269",
"303",
"339",
"377",
"417",
"459",
"503",
"549",
"597",
"647",
"699",
"753",
"809",
"867",
"927",
"989",
"1053",
"1119",
"1187",
"1257",
"1329",
"1403",
"1479",
"1557",
"1637",
"1719",
"1803",
"1889",
"1977",
"2067",
"2159",
"2253",
"2349",
"2447",
"2547",
"2649"
] |
[
"sign",
"easy"
] | 76 | 0 | 2 |
[
"A002522",
"A003215",
"A014209",
"A176271"
] | null |
N. J. A. Sloane
| 2024-10-31T13:34:09 |
oeisdata/seq/A014/A014209.seq
|
c01ca1f3d42f8ab200fe3e1f4852d4f8
|
A014210
|
Next prime after 2^n.
|
[
"2",
"3",
"5",
"11",
"17",
"37",
"67",
"131",
"257",
"521",
"1031",
"2053",
"4099",
"8209",
"16411",
"32771",
"65537",
"131101",
"262147",
"524309",
"1048583",
"2097169",
"4194319",
"8388617",
"16777259",
"33554467",
"67108879",
"134217757",
"268435459",
"536870923",
"1073741827",
"2147483659"
] |
[
"nonn",
"changed"
] | 42 | 0 | 1 |
[
"A014210",
"A014211",
"A014234",
"A054321",
"A104080",
"A203074",
"A338475"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:23 |
oeisdata/seq/A014/A014210.seq
|
db798726627eb84c34db864bca3597ed
|
A014211
|
Next prime after 3^n.
|
[
"2",
"5",
"11",
"29",
"83",
"251",
"733",
"2203",
"6563",
"19687",
"59051",
"177167",
"531457",
"1594331",
"4782971",
"14348909",
"43046747",
"129140197",
"387420499",
"1162261523",
"3486784409",
"10460353259",
"31381059613",
"94143178859",
"282429536483",
"847288609457"
] |
[
"nonn",
"changed"
] | 14 | 0 | 1 |
[
"A000244",
"A014210",
"A014211"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:30 |
oeisdata/seq/A014/A014211.seq
|
23926ee41ff9d88e46bfd350dba9fbea
|
A014212
|
Inverse of 203rd cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 |
[
"A014212",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T14:42:47 |
oeisdata/seq/A014/A014212.seq
|
f2e562e411abc8ce35bd5e42bfbce369
|
A014213
|
Floor((e/2)^n).
|
[
"1",
"1",
"1",
"2",
"3",
"4",
"6",
"8",
"11",
"15",
"21",
"29",
"39",
"54",
"73",
"99",
"135",
"184",
"250",
"340",
"462",
"628",
"854",
"1161",
"1578",
"2145",
"2916",
"3964",
"5387",
"7322",
"9952",
"13526",
"18384",
"24987",
"33961",
"46159",
"62736",
"85267",
"115891",
"157512",
"214081",
"290967",
"395465",
"537493"
] |
[
"nonn"
] | 12 | 0 | 4 | null | null |
Clark Kimberling
| 2013-10-24T03:38:36 |
oeisdata/seq/A014/A014213.seq
|
5817e9c445e69494bf9d4da0ce9902d4
|
A014214
|
a(n) = floor((Pi/2)^n).
|
[
"1",
"1",
"2",
"3",
"6",
"9",
"15",
"23",
"37",
"58",
"91",
"143",
"225",
"354",
"556",
"874",
"1373",
"2157",
"3389",
"5324",
"8363",
"13137",
"20636",
"32415",
"50918",
"79982",
"125636",
"197349",
"309996",
"486941",
"764885",
"1201479",
"1887278",
"2964530",
"4656673",
"7314686",
"11489882",
"18048264",
"28350147",
"44532308",
"69951185",
"109879065"
] |
[
"nonn"
] | 11 | 0 | 3 |
[
"A014214",
"A019669"
] | null |
Clark Kimberling
| 2025-06-08T13:46:57 |
oeisdata/seq/A014/A014214.seq
|
d6a2d0554caa11165502d90de3550cf2
|
A014215
|
[ sqrt(3/2)^n ].
|
[
"1",
"1",
"1",
"1",
"2",
"2",
"3",
"4",
"5",
"6",
"7",
"9",
"11",
"13",
"17",
"20",
"25",
"31",
"38",
"47",
"57",
"70",
"86",
"105",
"129",
"158",
"194",
"238",
"291",
"357",
"437",
"536",
"656",
"804",
"985",
"1206",
"1477",
"1810",
"2216",
"2715",
"3325",
"4072",
"4987",
"6108",
"7481",
"9163",
"11222",
"13744",
"16834",
"20617",
"25251",
"30926"
] |
[
"nonn"
] | 8 | 0 | 5 | null | null |
Clark Kimberling
| 2022-03-05T17:06:13 |
oeisdata/seq/A014/A014215.seq
|
450692be03247af35d203f268fe4a232
|
A014216
|
a(n) = floor(log(5)^n).
|
[
"1",
"1",
"2",
"4",
"6",
"10",
"17",
"27",
"45",
"72",
"116",
"187",
"302",
"486",
"782",
"1259",
"2026",
"3261",
"5249",
"8449",
"13598",
"21885",
"35223",
"56690",
"91239",
"146843",
"236336",
"380368",
"612178",
"985263",
"1585721",
"2552119",
"4107478",
"6610731",
"10639561",
"17123713",
"27559554",
"44355391",
"71387248"
] |
[
"nonn"
] | 14 | 0 | 3 | null | null |
Clark Kimberling
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014216.seq
|
c3249d6f6c3819819d95df6f4379b4a9
|
A014217
|
a(n) = floor(phi^n), where phi = (1+sqrt(5))/2 is the golden ratio.
|
[
"1",
"1",
"2",
"4",
"6",
"11",
"17",
"29",
"46",
"76",
"122",
"199",
"321",
"521",
"842",
"1364",
"2206",
"3571",
"5777",
"9349",
"15126",
"24476",
"39602",
"64079",
"103681",
"167761",
"271442",
"439204",
"710646",
"1149851",
"1860497",
"3010349",
"4870846",
"7881196",
"12752042",
"20633239",
"33385281",
"54018521",
"87403802"
] |
[
"nonn",
"easy",
"nice"
] | 197 | 0 | 3 |
[
"A000032",
"A000045",
"A001622",
"A014217",
"A020956",
"A022319",
"A052952",
"A057146",
"A062114",
"A128440",
"A153382",
"A169985",
"A169986",
"A181716",
"A203976",
"A226328"
] | null |
Clark Kimberling
| 2025-04-03T23:06:58 |
oeisdata/seq/A014/A014217.seq
|
e046b8dcb3d3ceda982505270a3e7c7b
|
A014218
|
Inverse of 209th cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 17 | 0 | 1 |
[
"A014218",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:15:16 |
oeisdata/seq/A014/A014218.seq
|
559d9f8e272e46a593767b7ba64b61f0
|
A014219
|
Inverse of 210th cyclotomic polynomial.
|
[
"1",
"1",
"0",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"0",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"0",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 18 | 0 | 1 |
[
"A014219",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:16:09 |
oeisdata/seq/A014/A014219.seq
|
90c9921fb56442cdb2d0e0fc92f73d45
|
A014220
|
Next prime after n^3.
|
[
"2",
"2",
"11",
"29",
"67",
"127",
"223",
"347",
"521",
"733",
"1009",
"1361",
"1733",
"2203",
"2749",
"3389",
"4099",
"4919",
"5839",
"6863",
"8009",
"9277",
"10651",
"12197",
"13829",
"15629",
"17579",
"19687",
"21961",
"24391",
"27011",
"29803",
"32771",
"35951",
"39313"
] |
[
"nonn"
] | 30 | 0 | 1 |
[
"A007491",
"A014220",
"A060199"
] | null |
N. J. A. Sloane
| 2023-10-30T07:21:30 |
oeisdata/seq/A014/A014220.seq
|
ff4e5481117cfdd0388b6dae4500a8d0
|
A014221
|
a(n+1) = 2^a(n) with a(-1) = 0.
|
[
"0",
"1",
"2",
"4",
"16",
"65536"
] |
[
"nonn",
"easy",
"nice"
] | 136 | -1 | 3 |
[
"A001695",
"A007013",
"A014221",
"A014222",
"A038081",
"A046859",
"A081651",
"A093382",
"A114561",
"A115658",
"A133612",
"A206636",
"A266198",
"A356022"
] | null |
N. J. A. Sloane, Jun 14 1998
| 2025-04-21T08:30:56 |
oeisdata/seq/A014/A014221.seq
|
d88d1ad5ebca34d6fdab6dde885d1a9f
|
A014222
|
a(0) = 0; thereafter a(n+1) = 3^a(n).
|
[
"0",
"1",
"3",
"27",
"7625597484987"
] |
[
"nonn",
"easy"
] | 44 | 0 | 3 |
[
"A014221",
"A014222",
"A081651",
"A114561",
"A266199"
] | null |
N. J. A. Sloane
| 2021-12-27T22:16:04 |
oeisdata/seq/A014/A014222.seq
|
a62f8dcf1e8206c0853cb9acfe120ad3
|
A014223
|
Odd primes such that (3p+1)/2 and 3p+4 are also prime.
|
[
"3",
"11",
"19",
"31",
"59",
"131",
"151",
"179",
"311",
"431",
"439",
"619",
"739",
"811",
"839",
"1039",
"1231",
"1399",
"1531",
"1699",
"1879",
"1951",
"2111",
"2351",
"2411",
"2671",
"2699",
"2719",
"2819",
"2939",
"3259",
"3391",
"3491",
"4211",
"4259",
"4639",
"5039",
"5779",
"6151",
"6359"
] |
[
"nonn"
] | 9 | 1 | 1 | null | null |
Jud McCranie
| 2013-11-21T12:46:03 |
oeisdata/seq/A014/A014223.seq
|
78db20af67bbfa8a8f8be10c84b0f54f
|
A014224
|
Numbers k such that 3^k - 2 is prime.
|
[
"2",
"4",
"5",
"6",
"9",
"22",
"37",
"41",
"90",
"102",
"105",
"317",
"520",
"541",
"561",
"648",
"780",
"786",
"957",
"1353",
"2224",
"2521",
"6184",
"7989",
"8890",
"19217",
"20746",
"31722",
"37056",
"69581",
"195430",
"225922",
"506233",
"761457",
"1180181"
] |
[
"nonn",
"more"
] | 80 | 1 | 1 |
[
"A014224",
"A058481",
"A058959",
"A171271"
] | null |
Jud McCranie
| 2024-08-04T05:34:40 |
oeisdata/seq/A014/A014224.seq
|
c5cffb6323a88b0e45e7e69a6d45f727
|
A014225
|
Number of initial pieces needed to reach level n in the Solitaire Army game.
|
[
"1",
"2",
"4",
"8",
"20"
] |
[
"nonn",
"fini",
"full",
"changed"
] | 25 | 0 | 2 |
[
"A000980",
"A014225"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:36 |
oeisdata/seq/A014/A014225.seq
|
f3ed0fd8df64c52657fea90aa184d25d
|
A014226
|
Inverse of 217th cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 15 | 0 | 1 |
[
"A014226",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:16:57 |
oeisdata/seq/A014/A014226.seq
|
2927d5ed14d34e7a6717e5f7a9ddf66e
|
A014227
|
Minimal number of initial pieces needed to reach level n in the Solitaire Army game on a hexagonal lattice (a finite sequence).
|
[
"1",
"2",
"3",
"5",
"9",
"17",
"36",
"145"
] |
[
"nonn",
"fini",
"full"
] | 19 | 0 | 2 |
[
"A014225",
"A014227"
] | null |
N. J. A. Sloane and E. M. Rains
| 2024-08-04T05:35:18 |
oeisdata/seq/A014/A014227.seq
|
0107432219532fd56747747a230f8791
|
A014228
|
Product of 3 successive Catalan numbers.
|
[
"2",
"10",
"140",
"2940",
"77616",
"2378376",
"80978040",
"2982691140",
"116776877360",
"4800591267472",
"205384736883872",
"9084324900632800",
"413286869105712000",
"19262120149391220000",
"916763612521908006000",
"44440565510927197408500",
"2189466044883038600910000"
] |
[
"nonn",
"changed"
] | 22 | 0 | 1 |
[
"A000108",
"A005568",
"A014228",
"A342288"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:41 |
oeisdata/seq/A014/A014228.seq
|
abd27fa68128e3a38a99272051a4d62c
|
A014229
|
Inverse of 220th cyclotomic polynomial.
|
[
"1",
"0",
"-1",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 18 | 0 | 1 |
[
"A014229",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:18:13 |
oeisdata/seq/A014/A014229.seq
|
bedad5a4d937d21516c913d8829da7fd
|
A014230
|
Inverse of 221st cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 18 | 0 | 1 |
[
"A014230",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:19:10 |
oeisdata/seq/A014/A014230.seq
|
37edc170f62ab6dd1ac896f1a627f2c7
|
A014231
|
(Product of 3 successive Catalan numbers)/2.
|
[
"1",
"5",
"70",
"1470",
"38808",
"1189188",
"40489020",
"1491345570",
"58388438680",
"2400295633736",
"102692368441936",
"4542162450316400",
"206643434552856000",
"9631060074695610000",
"458381806260954003000",
"22220282755463598704250",
"1094733022441519300455000",
"54717445279576990999935000"
] |
[
"nonn",
"changed"
] | 11 | 0 | 2 |
[
"A000108",
"A014231"
] | null |
N. J. A. Sloane
| 2025-07-08T02:55:47 |
oeisdata/seq/A014/A014231.seq
|
f8645f006613a1bca9b4a5d32d065a9c
|
A014232
|
Primes of the form 3^k - 2.
|
[
"7",
"79",
"241",
"727",
"19681",
"31381059607",
"450283905890997361",
"36472996377170786401",
"8727963568087712425891397479476727340041447",
"4638397686588101979328150167890591454318967698007"
] |
[
"nonn"
] | 31 | 1 | 1 |
[
"A000040",
"A007593",
"A014224",
"A014232"
] | null |
Jud McCranie
| 2023-11-09T10:16:42 |
oeisdata/seq/A014/A014232.seq
|
691b4c83eee3d81f3bb4dda86c8cec47
|
A014233
|
Smallest odd number for which Miller-Rabin primality test on bases <= n-th prime does not reveal compositeness.
|
[
"2047",
"1373653",
"25326001",
"3215031751",
"2152302898747",
"3474749660383",
"341550071728321",
"341550071728321",
"3825123056546413051",
"3825123056546413051",
"3825123056546413051",
"318665857834031151167461",
"3317044064679887385961981"
] |
[
"nonn",
"hard",
"more"
] | 76 | 1 | 1 | null | null |
Jud McCranie, Feb 15 1997
| 2025-04-05T09:04:28 |
oeisdata/seq/A014/A014233.seq
|
e2605e0e26f89884d1a0483f90692582
|
A014234
|
Largest prime <= 2^n.
|
[
"2",
"3",
"7",
"13",
"31",
"61",
"127",
"251",
"509",
"1021",
"2039",
"4093",
"8191",
"16381",
"32749",
"65521",
"131071",
"262139",
"524287",
"1048573",
"2097143",
"4194301",
"8388593",
"16777213",
"33554393",
"67108859",
"134217689",
"268435399",
"536870909",
"1073741789",
"2147483647",
"4294967291",
"8589934583",
"17179869143",
"34359738337",
"68719476731",
"137438953447"
] |
[
"nonn"
] | 50 | 1 | 1 |
[
"A000079",
"A007053",
"A013603",
"A014210",
"A014234",
"A027611",
"A035100",
"A036378",
"A092131",
"A104080",
"A130739",
"A143658",
"A211997",
"A293697",
"A372684",
"A372889"
] | null |
Jud McCranie
| 2024-06-03T16:04:55 |
oeisdata/seq/A014/A014234.seq
|
69898c702da9bde349ba0d6e92fbfe5c
|
A014235
|
Number of n X n matrices with entries 0 and 1 and no 2 X 2 submatrix of form [ 1 1; 1 0 ].
|
[
"1",
"2",
"12",
"128",
"2100",
"48032",
"1444212",
"54763088",
"2540607060",
"140893490432",
"9170099291892",
"690117597121328",
"59318536757456340",
"5763381455631211232",
"627402010180980401652",
"75942075645205885599248",
"10153054354133705795859540",
"1490544499134409408040599232"
] |
[
"nonn"
] | 61 | 0 | 2 |
[
"A014235",
"A023997",
"A048163",
"A111420",
"A213977",
"A334689"
] | null |
Robert Israel
| 2023-08-31T10:50:39 |
oeisdata/seq/A014/A014235.seq
|
794ab856aed890ead1600feb919f0685
|
A014236
|
Expansion of g.f.: 2*x*(1-x)/((1-2*x)*(1-2*x^2)).
|
[
"0",
"2",
"2",
"8",
"12",
"32",
"56",
"128",
"240",
"512",
"992",
"2048",
"4032",
"8192",
"16256",
"32768",
"65280",
"131072",
"261632",
"524288",
"1047552",
"2097152",
"4192256",
"8388608",
"16773120",
"33554432",
"67100672",
"134217728",
"268419072",
"536870912",
"1073709056",
"2147483648",
"4294901760",
"8589934592"
] |
[
"nonn",
"easy"
] | 34 | 0 | 2 |
[
"A014236",
"A027556"
] | null |
Paul F. Hudrlik (hudrlik(AT)scs.howard.edu)
| 2023-06-25T21:06:07 |
oeisdata/seq/A014/A014236.seq
|
1276bceb6715c939fa955a440f18b7b5
|
A014237
|
a(n) = (n-th prime) - (n-th nonprime).
|
[
"1",
"-1",
"-1",
"-1",
"2",
"3",
"5",
"5",
"8",
"13",
"13",
"17",
"20",
"21",
"23",
"28",
"33",
"34",
"39",
"41",
"41",
"46",
"49",
"54",
"61",
"63",
"64",
"67",
"67",
"69",
"82",
"85",
"89",
"90",
"99",
"100",
"105",
"109",
"112",
"117",
"122",
"123",
"131",
"131",
"134",
"135",
"146",
"157",
"159",
"160",
"163",
"167",
"167",
"176",
"181",
"186",
"191",
"191",
"196"
] |
[
"sign"
] | 12 | 1 | 5 |
[
"A014237",
"A026233",
"A038529",
"A127118"
] | null |
Clark Kimberling
| 2019-06-22T23:13:43 |
oeisdata/seq/A014/A014237.seq
|
2c0fa7a77c0536a3640e6baa675218ab
|
A014238
|
a(n) = (n-th number that is 1 or prime) - (n-th composite number).
|
[
"-3",
"-4",
"-5",
"-4",
"-3",
"-1",
"-1",
"2",
"3",
"5",
"9",
"10",
"15",
"17",
"18",
"21",
"26",
"31",
"31",
"35",
"38",
"39",
"44",
"47",
"51",
"58",
"61",
"61",
"63",
"64",
"67",
"79",
"82",
"87",
"88",
"97",
"97",
"102",
"107",
"110",
"115",
"119",
"119",
"128",
"129",
"132",
"133",
"143",
"154",
"157",
"157",
"159",
"164",
"165",
"174",
"179",
"183",
"188",
"189"
] |
[
"sign"
] | 7 | 1 | 1 |
[
"A000045",
"A014238",
"A018252"
] | null |
Clark Kimberling
| 2019-06-22T23:13:50 |
oeisdata/seq/A014/A014238.seq
|
ad7c4c1e34b9c282e3543e17554477b8
|
A014239
|
Inverse of 230th cyclotomic polynomial.
|
[
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 16 | 0 | 1 |
[
"A014239",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:19:50 |
oeisdata/seq/A014/A014239.seq
|
71cd7a16bd3c57a9884f8920563d566f
|
A014240
|
Inverse of 231st cyclotomic polynomial.
|
[
"1",
"-1",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"1",
"0",
"-1"
] |
[
"sign",
"easy"
] | 14 | 0 | 1 |
[
"A014240",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2023-04-20T14:53:27 |
oeisdata/seq/A014/A014240.seq
|
6beb1fe2f62cff4dccf2d1c4dbf0c38b
|
A014241
|
a(n) = ((n+1)-st Fibonacci number) - (n-th non-Fibonacci number).
|
[
"-3",
"-4",
"-4",
"-4",
"-2",
"2",
"9",
"20",
"40",
"73",
"127",
"215",
"358",
"590",
"965",
"1574",
"2560",
"4156",
"6739",
"10919",
"17683",
"28628",
"46338",
"74994",
"121361",
"196385",
"317776",
"514193",
"832003",
"1346231",
"2178270",
"3524538",
"5702846",
"9227423"
] |
[
"sign"
] | 17 | 1 | 1 |
[
"A000045",
"A001690",
"A014241"
] | null |
Clark Kimberling
| 2019-06-23T19:23:34 |
oeisdata/seq/A014/A014241.seq
|
37b27daf2cee6634bba9b82855bad6d1
|
A014242
|
(n-th Fibonacci number that is not 1) - (n-th number that is 1 or not a Fibonacci number).
|
[
"1",
"-1",
"-1",
"1",
"4",
"11",
"23",
"43",
"75",
"129",
"217",
"360",
"592",
"968",
"1577",
"2562",
"4158",
"6741",
"10921",
"17685",
"28630",
"46340",
"74996",
"121363",
"196387",
"317779",
"514196",
"832005",
"1346233",
"2178272",
"3524540",
"5702848",
"9227425"
] |
[
"sign"
] | 5 | 1 | 5 | null | null |
Clark Kimberling
| 2017-01-09T16:29:02 |
oeisdata/seq/A014/A014242.seq
|
fa95c4b0d24468eb82db91b74532958a
|
A014243
|
a(n) = ((n+1)-st Lucas number) - (n-th non-Lucas number).
|
[
"-2",
"-2",
"-1",
"2",
"8",
"17",
"34",
"62",
"108",
"183",
"305",
"502",
"823",
"1343",
"2185",
"3548",
"5754",
"9324",
"15101",
"24449",
"39575",
"64049",
"103651",
"167729",
"271410",
"439170",
"710612",
"1149815",
"1860461",
"3010311",
"4870808",
"7881156"
] |
[
"sign"
] | 15 | 1 | 1 |
[
"A000032",
"A014243",
"A057854"
] | null |
Clark Kimberling
| 2019-06-20T09:09:54 |
oeisdata/seq/A014/A014243.seq
|
c578bbc3ecaef515d8221bdbe0769441
|
A014244
|
(n-th Lucas number that is not 1) - (n-th number that is 1 or not a Lucas number).
|
[
"2",
"2",
"2",
"5",
"10",
"20",
"37",
"64",
"110",
"185",
"307",
"505",
"826",
"1345",
"2187",
"3550",
"5756",
"9326",
"15103",
"24451",
"39577",
"64052",
"103654",
"167731",
"271412",
"439172",
"710614",
"1149817",
"1860463",
"3010313",
"4870810",
"7881158"
] |
[
"nonn"
] | 8 | 1 | 1 | null | null |
Clark Kimberling
| 2019-06-22T15:30:50 |
oeisdata/seq/A014/A014244.seq
|
3523fcd87b9cab2f4fff5aa351c8e265
|
A014245
|
a(n) = (n-th term of Beatty sequence for (3+sqrt(3))/2) - (n-th term of Beatty sequence for sqrt(3)).
|
[
"1",
"1",
"2",
"3",
"3",
"4",
"4",
"5",
"6",
"6",
"7",
"8",
"8",
"9",
"10",
"10",
"11",
"11",
"12",
"13",
"13",
"14",
"15",
"15",
"16",
"16",
"17",
"18",
"18",
"19",
"20",
"20",
"21",
"22",
"22",
"23",
"23",
"24",
"25",
"25",
"26",
"27",
"27",
"28",
"29",
"29",
"30",
"30",
"31",
"32",
"32",
"33",
"34",
"34",
"35",
"36",
"36",
"37",
"37",
"38",
"39",
"39",
"40",
"41",
"41",
"42",
"42",
"43",
"44",
"44",
"45",
"46",
"46",
"47"
] |
[
"nonn"
] | 25 | 1 | 3 |
[
"A014245",
"A022838",
"A054406"
] | null |
Clark Kimberling
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014245.seq
|
81370496d7e2e5833442542d045b71cc
|
A014246
|
a(n) = (n-th term of Beatty sequence for e) - (n-th term of Beatty sequence for e/(e-1)).
|
[
"1",
"2",
"4",
"4",
"6",
"7",
"8",
"9",
"10",
"12",
"12",
"14",
"15",
"16",
"17",
"18",
"20",
"20",
"21",
"23",
"24",
"25",
"26",
"28",
"28",
"29",
"31",
"32",
"33",
"34",
"35",
"36",
"37",
"39",
"40",
"41",
"42",
"43",
"45",
"45",
"47",
"48",
"48",
"50",
"51",
"53",
"53",
"55",
"56",
"56",
"58",
"59",
"61",
"61",
"62",
"64",
"64",
"66",
"67",
"69",
"69",
"70",
"72",
"72",
"74",
"75",
"77",
"77",
"78",
"80",
"80",
"82"
] |
[
"nonn"
] | 16 | 1 | 2 |
[
"A014246",
"A022843",
"A054385"
] | null |
Clark Kimberling
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014246.seq
|
14e4ebe619544d378042fb5941c4ecdc
|
A014247
|
Inverse of 238th cyclotomic polynomial.
|
[
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 12 | 0 | 1 |
[
"A014247",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:21:42 |
oeisdata/seq/A014/A014247.seq
|
bdc2fbc49a995d32af1476af42d57ccd
|
A014248
|
a(n) = b(n) - c(n) where b(n) = [ n*(sqrt(2)+sqrt(3)) ] and c(n) is the n-th number not in sequence b( ).
|
[
"2",
"4",
"5",
"7",
"8",
"10",
"12",
"14",
"15",
"17",
"18",
"20",
"21",
"24",
"26",
"27",
"29",
"30",
"32",
"33",
"36",
"37",
"39",
"40",
"42",
"43",
"45",
"47",
"49",
"51",
"52",
"54",
"55",
"57",
"59",
"61",
"62",
"64",
"65",
"67",
"68",
"71",
"72",
"74",
"76",
"77",
"79",
"81",
"83",
"84",
"86",
"87",
"89",
"90",
"93",
"94",
"96",
"97",
"99",
"101",
"102",
"105",
"106",
"108",
"109",
"111"
] |
[
"nonn"
] | 13 | 1 | 1 |
[
"A014248",
"A110117",
"A110118"
] | null |
Clark Kimberling
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014248.seq
|
77575e067b60a09290ce35933b74572c
|
A014249
|
a(n) = b(n) - c(n) where b(n) = [n*sqrt(2)] + [n*sqrt(3)] and c(n) is the n-th number not in sequence b.
|
[
"1",
"2",
"5",
"5",
"8",
"10",
"11",
"12",
"14",
"17",
"18",
"19",
"21",
"23",
"24",
"26",
"28",
"30",
"30",
"33",
"35",
"37",
"38",
"39",
"41",
"43",
"45",
"46",
"49",
"49",
"51",
"53",
"55",
"56",
"58",
"60",
"62",
"63",
"65",
"66",
"68",
"70",
"71",
"74",
"74",
"77",
"79",
"80",
"81",
"83",
"85",
"87",
"88",
"90",
"92",
"93",
"95",
"97",
"99",
"99",
"102",
"104",
"106",
"106",
"108",
"110"
] |
[
"nonn"
] | 14 | 1 | 2 |
[
"A001951",
"A014249",
"A022838"
] | null |
Clark Kimberling
| 2019-06-20T09:09:45 |
oeisdata/seq/A014/A014249.seq
|
e8ed93d49dc0b338772f96c26d6f6577
|
A014250
|
a(n) = b(n) - c(n) where b(n) = [ (3/2)^n ] and c(n) is the n-th number not in sequence b.
|
[
"-3",
"-4",
"-5",
"-4",
"-3",
"-1",
"4",
"11",
"23",
"41",
"68",
"110",
"174",
"270",
"415",
"633",
"961",
"1451",
"2189",
"3297",
"4958",
"7451",
"11191",
"16802",
"25218",
"37842",
"56780",
"85186",
"127797",
"191712",
"287586",
"431398",
"647117",
"970696",
"1456065",
"2184119",
"3276200",
"4914322"
] |
[
"sign"
] | 12 | 1 | 1 |
[
"A002379",
"A014250"
] | null |
Clark Kimberling
| 2019-06-21T22:50:34 |
oeisdata/seq/A014/A014250.seq
|
6ebe9db9d7ba0c4419e5c65ffa0d0ee3
|
A014251
|
a(n) = b(n) - c(n) where b(n) is the n-th Fibonacci number greater than 2 and c(n) is the n-th number not in sequence b( ).
|
[
"2",
"3",
"4",
"7",
"14",
"25",
"45",
"78",
"132",
"219",
"362",
"594",
"970",
"1579",
"2565",
"4161",
"6743",
"10923",
"17687",
"28632",
"46342",
"74998",
"121365",
"196389",
"317781",
"514198",
"832008",
"1346236",
"2178274",
"3524542",
"5702850",
"9227427",
"14930313",
"24157777",
"39088128",
"63245944",
"102334112",
"165580097",
"267914251",
"433494391"
] |
[
"nonn"
] | 8 | 1 | 1 | null | null |
Clark Kimberling
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014251.seq
|
8bacaff7477459f463f5d097f2116a04
|
A014252
|
a(n) = b(n) - c(n) where b(n) is the n-th Lucas number greater than 3 and c(n) is the n-th number not in sequence b( ).
|
[
"3",
"5",
"8",
"13",
"23",
"39",
"67",
"113",
"187",
"309",
"507",
"828",
"1348",
"2190",
"3552",
"5758",
"9328",
"15105",
"24453",
"39579",
"64054",
"103656",
"167734",
"271415",
"439174",
"710616",
"1149819",
"1860465",
"3010315",
"4870812",
"7881160",
"12752006",
"20633201",
"33385243",
"54018481"
] |
[
"nonn"
] | 12 | 1 | 1 |
[
"A000032",
"A014252"
] | null |
Clark Kimberling
| 2019-06-20T19:36:47 |
oeisdata/seq/A014/A014252.seq
|
41d17717121656589e81da06bb1bacc6
|
A014253
|
a(n) = b(n)^2, where b(n) = b(n-1)^2 + b(n-2)^2 (A000283).
|
[
"0",
"1",
"1",
"4",
"25",
"841",
"749956",
"563696135209",
"317754178344723197077225",
"100967717855888389973004528722798800700252204356"
] |
[
"nonn"
] | 20 | 0 | 4 | null | null |
N. J. A. Sloane
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014253.seq
|
70f3afcf106bdb40aadc688cf04afda5
|
A014254
|
Liponombres: numbers whose French name does not contain the letter "e".
|
[
"1",
"3",
"5",
"6",
"8",
"10",
"18",
"20",
"23",
"25",
"26",
"28",
"1000000",
"1000001",
"1000003",
"1000005",
"1000006",
"1000008",
"1000010",
"1000018",
"1000020",
"1000023",
"1000025",
"1000026",
"1000028",
"3000000",
"3000001",
"3000003",
"3000005",
"3000006",
"3000008",
"3000010"
] |
[
"nonn",
"word",
"fini"
] | 27 | 1 | 2 |
[
"A006933",
"A007005",
"A014254",
"A050280",
"A139121",
"A139212",
"A167507",
"A233185"
] | null |
Olivier Gérard
| 2023-02-02T09:41:18 |
oeisdata/seq/A014/A014254.seq
|
d68fbf043a4b2fe5fa7b388dba169c04
|
A014255
|
Expansion of (1+2*x+3*x^2)/((1-x)*(1-x^2)^2).
|
[
"1",
"3",
"8",
"12",
"21",
"27",
"40",
"48",
"65",
"75",
"96",
"108",
"133",
"147",
"176",
"192",
"225",
"243",
"280",
"300",
"341",
"363",
"408",
"432",
"481",
"507",
"560",
"588",
"645",
"675",
"736",
"768",
"833",
"867",
"936",
"972",
"1045",
"1083",
"1160",
"1200",
"1281",
"1323",
"1408",
"1452",
"1541",
"1587",
"1680",
"1728",
"1825",
"1875",
"1976",
"2028"
] |
[
"nonn",
"easy"
] | 54 | 0 | 2 | null | null |
N. J. A. Sloane
| 2024-12-20T16:13:15 |
oeisdata/seq/A014/A014255.seq
|
c5395095ba0a4b3ddfdc6061f45df057
|
A014256
|
Inverse of 247th cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 12 | 0 | 1 |
[
"A014256",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2017-04-03T15:22:43 |
oeisdata/seq/A014/A014256.seq
|
d78f06cbbbf2f4eae06130f47e7efa89
|
A014257
|
Product of digits of 2^n.
|
[
"1",
"2",
"4",
"8",
"6",
"6",
"24",
"16",
"60",
"10",
"0",
"0",
"0",
"144",
"576",
"2016",
"2700",
"0",
"384",
"5120",
"0",
"0",
"0",
"0",
"24696",
"21600",
"0",
"18816",
"691200",
"0",
"0",
"1032192",
"11757312",
"27993600",
"6096384",
"39191040",
"64012032",
"15240960",
"0",
"387072000",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"125971200",
"0",
"4180377600",
"0",
"0",
"0"
] |
[
"nonn",
"base",
"easy",
"changed"
] | 10 | 0 | 2 |
[
"A000079",
"A007377",
"A014257"
] | null |
N. J. A. Sloane
| 2025-07-08T05:34:55 |
oeisdata/seq/A014/A014257.seq
|
cb5f6c2169bd5248a681b730b0de50b5
|
A014258
|
Iccanobif numbers: add previous two terms and reverse the sum.
|
[
"0",
"1",
"1",
"2",
"3",
"5",
"8",
"31",
"93",
"421",
"415",
"638",
"3501",
"9314",
"51821",
"53116",
"739401",
"715297",
"8964541",
"8389769",
"1345371",
"415379",
"570671",
"50689",
"63126",
"518311",
"734185",
"6942521",
"6076767",
"88291031",
"89776349",
"83760871",
"22735371",
"242694601",
"279924562",
"361916225",
"787048146"
] |
[
"nonn",
"base",
"easy"
] | 29 | 0 | 4 |
[
"A000045",
"A001129",
"A014258",
"A014259",
"A014260"
] | null |
N. J. A. Sloane
| 2023-11-03T20:22:06 |
oeisdata/seq/A014/A014258.seq
|
29dff85791d06c7420fa12ad22254f39
|
A014259
|
Iccanobif numbers: add reversal of a(n-1) to a(n-2).
|
[
"0",
"1",
"1",
"2",
"3",
"5",
"8",
"13",
"39",
"106",
"640",
"152",
"891",
"350",
"944",
"799",
"1941",
"2290",
"2863",
"5972",
"5658",
"14537",
"79199",
"113734",
"516510",
"129349",
"1460431",
"1469990",
"2460072",
"4170632",
"4820786",
"11040916",
"66724797",
"90783682",
"95363506",
"151320041",
"235386657",
"908003573",
"610687466"
] |
[
"nonn",
"base",
"easy"
] | 16 | 0 | 4 |
[
"A000045",
"A001129",
"A014258",
"A014259",
"A014260"
] | null |
N. J. A. Sloane
| 2021-08-02T02:36:05 |
oeisdata/seq/A014/A014259.seq
|
1c059611045b93bc4a6d7202cded35e5
|
A014260
|
Iccanobif numbers: add a(n-1) to reversal of a(n-2).
|
[
"0",
"1",
"1",
"2",
"3",
"5",
"8",
"13",
"21",
"52",
"64",
"89",
"135",
"233",
"764",
"1096",
"1563",
"8464",
"12115",
"16763",
"67884",
"104645",
"153521",
"699922",
"825273",
"1055269",
"1427797",
"11053298",
"19030539",
"108265550",
"201768641",
"257331442",
"404198544",
"648332296",
"1094223700",
"1786457546",
"1859682447"
] |
[
"nonn",
"base",
"easy"
] | 16 | 0 | 4 |
[
"A000045",
"A001129",
"A014258",
"A014259",
"A014260"
] | null |
N. J. A. Sloane
| 2021-08-02T02:34:47 |
oeisdata/seq/A014/A014260.seq
|
6a2915d758f4929b43dd25f0525f0c16
|
A014261
|
Numbers that contain odd digits only.
|
[
"1",
"3",
"5",
"7",
"9",
"11",
"13",
"15",
"17",
"19",
"31",
"33",
"35",
"37",
"39",
"51",
"53",
"55",
"57",
"59",
"71",
"73",
"75",
"77",
"79",
"91",
"93",
"95",
"97",
"99",
"111",
"113",
"115",
"117",
"119",
"131",
"133",
"135",
"137",
"139",
"151",
"153",
"155",
"157",
"159",
"171",
"173",
"175",
"177",
"179",
"191",
"193",
"195",
"197",
"199",
"311",
"313",
"315",
"317",
"319"
] |
[
"nonn",
"base",
"easy",
"look"
] | 90 | 1 | 2 |
[
"A001743",
"A001744",
"A005408",
"A010879",
"A014261",
"A014263",
"A030096",
"A046034",
"A059708",
"A066640",
"A084545",
"A084984",
"A089581",
"A192107",
"A194181",
"A196564",
"A202267",
"A202268",
"A225985"
] | null |
N. J. A. Sloane
| 2024-11-18T11:07:06 |
oeisdata/seq/A014/A014261.seq
|
eef7cb101914221c33ac208c79f3b3df
|
A014262
|
Inverse of 253rd cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 28 | 0 | 1 |
[
"A014262",
"A240328",
"A240467"
] | null |
Simon Plouffe
| 2018-02-19T11:01:01 |
oeisdata/seq/A014/A014262.seq
|
1f6017447cf69e29aa8dd670bbbb440d
|
A014263
|
Numbers that contain even digits only.
|
[
"0",
"2",
"4",
"6",
"8",
"20",
"22",
"24",
"26",
"28",
"40",
"42",
"44",
"46",
"48",
"60",
"62",
"64",
"66",
"68",
"80",
"82",
"84",
"86",
"88",
"200",
"202",
"204",
"206",
"208",
"220",
"222",
"224",
"226",
"228",
"240",
"242",
"244",
"246",
"248",
"260",
"262",
"264",
"266",
"268",
"280",
"282",
"284",
"286",
"288",
"400",
"402",
"404",
"406",
"408",
"420",
"422",
"424"
] |
[
"nonn",
"base",
"easy",
"changed"
] | 80 | 1 | 2 |
[
"A001743",
"A007091",
"A014261",
"A014263",
"A017042",
"A046034",
"A052382",
"A059708",
"A061810",
"A061811",
"A084544",
"A084984",
"A089581",
"A194182",
"A196563",
"A202267",
"A202268"
] | null |
N. J. A. Sloane
| 2025-07-07T19:49:08 |
oeisdata/seq/A014/A014263.seq
|
9e49999924304afe4ab0d47191741d9c
|
A014264
|
Inverse of 255th cyclotomic polynomial.
|
[
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014264.seq
|
faa4594639642e6964717ec87ce47e0d
|
A014265
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"2",
"2",
"4",
"7",
"15",
"30",
"68",
"146",
"340",
"786",
"1878",
"4507",
"11045",
"27220",
"67956",
"170766",
"432818",
"1103539",
"2831814",
"7303966",
"18934866",
"49302321",
"128910528",
"338329555",
"891099316",
"2354613762",
"6240696052",
"16587146598",
"44203851675",
"118093003229"
] |
[
"nonn",
"changed"
] | 16 | 0 | 5 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:04 |
oeisdata/seq/A014/A014265.seq
|
4e248c5c8a01b2b757aefaf1e4c8af25
|
A014266
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"2",
"2",
"4",
"7",
"16",
"30",
"68",
"146",
"340",
"786",
"1878",
"4507",
"11045",
"27220",
"67956",
"170766",
"432818",
"1103539",
"2831814",
"7303966",
"18934866",
"49302321",
"128910528",
"338329555",
"891099316",
"2354613762",
"6240696052",
"16587146598",
"44203851675",
"118093003229"
] |
[
"nonn",
"changed"
] | 25 | 0 | 5 |
[
"A014265",
"A014266"
] | null |
N. J. A. Sloane
| 2025-07-08T05:35:09 |
oeisdata/seq/A014/A014266.seq
|
45f05d50c3dc4e5b080c1392d582b401
|
A014267
|
Number of rooted trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"2",
"4",
"9",
"20",
"47",
"112",
"279",
"701",
"1794",
"4636",
"12130",
"31987",
"85062",
"227673",
"613126",
"1659712",
"4514249",
"12329670",
"33804673",
"93001852",
"256667215",
"710381240",
"1971312184",
"5483656721",
"15288227949",
"42711458197",
"119555284629",
"335253287132"
] |
[
"nonn",
"changed"
] | 18 | 0 | 4 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:14 |
oeisdata/seq/A014/A014267.seq
|
d510021a958cc27461aab57dd09ab714
|
A014268
|
Inverse of 259th cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 16 | 0 | 1 |
[
"A014268",
"A291137"
] | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014268.seq
|
2815eb3cc53feff0072edec628632e0e
|
A014269
|
Inverse of 260th cyclotomic polynomial.
|
[
"1",
"0",
"-1",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"-1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014269.seq
|
330b3b48ec7f412641e7c22c84b01653
|
A014270
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"2",
"3",
"6",
"10",
"21",
"45",
"100",
"223",
"522",
"1234",
"2997",
"7344",
"18325",
"46098",
"117340",
"300935",
"778249",
"2025542",
"5305684",
"13972364",
"36985033",
"98344160",
"262612283",
"703971120",
"1893895747",
"5112056798",
"13841346542",
"37584596256",
"102331837104",
"279322502700",
"764238954757",
"2095651789775",
"5758646716947",
"15855576055018",
"43737831483597"
] |
[
"nonn",
"changed"
] | 16 | 0 | 5 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:20 |
oeisdata/seq/A014/A014270.seq
|
09043387e58f6d9117dd263d780539f8
|
A014271
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"2",
"5",
"18",
"70",
"282",
"1189",
"5144",
"22804",
"102908",
"471477",
"2186648",
"10247609",
"48449798",
"230819691",
"1106961890",
"5339801036",
"25891658674",
"126123321469",
"616916700222",
"3028854625890",
"14921089624916",
"73733085073247",
"365384562116904",
"1815365194118833"
] |
[
"nonn",
"changed"
] | 17 | 0 | 3 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:26 |
oeisdata/seq/A014/A014271.seq
|
2c4ef82678a91b17dd557f3d980dddf0
|
A014272
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"2",
"4",
"14",
"45",
"165",
"614",
"2420",
"9782",
"40721",
"172854",
"747625",
"3281033",
"14588999",
"65592358",
"297820064",
"1363972446",
"6295216621",
"29256113070",
"136814371958",
"643430589703",
"3041643631339",
"14446433252944",
"68911476411569",
"330030134676707",
"1586412426225015",
"7651783461702750",
"37024499137803700"
] |
[
"nonn",
"changed"
] | 15 | 0 | 4 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:32 |
oeisdata/seq/A014/A014272.seq
|
f1902adfe0140a9203acef459483080a
|
A014273
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"2",
"5",
"19",
"73",
"297",
"1256",
"5467",
"24368",
"110610",
"509715",
"2377978",
"11210451",
"53318599",
"255537199",
"1232866889",
"5982965779",
"29185293329",
"143026402189",
"703829126231",
"3476496240860",
"17230140895115",
"85659915381510",
"427065111704502",
"2134705956413458"
] |
[
"nonn",
"changed"
] | 19 | 0 | 3 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:39 |
oeisdata/seq/A014/A014273.seq
|
d93bfafe484ac3941bdecf1391248169
|
A014274
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"5",
"15",
"50",
"180",
"676",
"2666",
"10831",
"45263",
"193097",
"839305",
"3702793",
"16552491",
"74829186",
"341652547",
"1573557441",
"7303953109",
"34139363401",
"160575404720",
"759577584604",
"3611720900930",
"17254901764792",
"82793934434748",
"398862862215977",
"1928661772504001",
"9357906461877107",
"45549820100444687"
] |
[
"nonn",
"changed"
] | 15 | 0 | 5 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:44 |
oeisdata/seq/A014/A014274.seq
|
42c995c2c87fd8ce6807958950b38770
|
A014275
|
Inverse of 266th cyclotomic polynomial.
|
[
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 15 | 0 | 1 | null | null |
Simon Plouffe
| 2023-04-20T14:44:24 |
oeisdata/seq/A014/A014275.seq
|
9f0800f8a02ff3ebda703784deca6a8a
|
A014276
|
Number of directed rooted trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"3",
"15",
"82",
"495",
"3144",
"20874",
"142766",
"1000083",
"7136463",
"51699614",
"379214625",
"2810720045",
"21018835670",
"158389275075",
"1201541422730",
"9168456492986",
"70324572634341",
"541910543713685",
"4193257236992896",
"32568879336517050",
"253822497160605899",
"1984276479881989537",
"15556238037968354214",
"122274773948426045945"
] |
[
"nonn",
"changed"
] | 21 | 0 | 3 |
[
"A006964",
"A014276"
] | null |
N. J. A. Sloane
| 2025-07-08T05:35:50 |
oeisdata/seq/A014/A014276.seq
|
6af12e72cd20ff1992fad736efb5c7ee
|
A014277
|
Erroneous version of A269484.
|
[
"0",
"1",
"2",
"6",
"25",
"114",
"591",
"3297",
"19528",
"120670",
"7712276",
"5061164",
"33940023"
] |
[
"dead"
] | 19 | 0 | 3 | null | null |
N. J. A. Sloane
| 2025-07-08T05:35:56 |
oeisdata/seq/A014/A014277.seq
|
4578c0b9662cd69a6eb42bc4dda15471
|
A014278
|
Number of trees on n nodes with 3 forbidden limbs of size 4, 5 and 6.
|
[
"0",
"1",
"1",
"2",
"3",
"6",
"12",
"30",
"67",
"159",
"381",
"929",
"2282",
"5680",
"14241",
"36009",
"91611",
"234512",
"603330",
"1559582",
"4047956",
"10546556",
"27570983",
"72301171",
"190136444",
"501323021",
"1324981299",
"3509660618",
"9315633928",
"24773632117",
"65999430834",
"176121938800",
"470720836811",
"1259936118810",
"3376997883966",
"9063076063854"
] |
[
"nonn",
"changed"
] | 17 | 0 | 4 | null | null |
N. J. A. Sloane
| 2025-07-08T05:36:03 |
oeisdata/seq/A014/A014278.seq
|
4a27baaaa093e920b1384851829bbe9f
|
A014279
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"1",
"1",
"2",
"6",
"10",
"20",
"44",
"93",
"207",
"468",
"1085",
"2533",
"6028",
"14447",
"35044",
"85603",
"210846",
"522471",
"1302878",
"3265540",
"8225968",
"20811621",
"52871283",
"134818074",
"344980825",
"885594103",
"2280242386",
"5887628644",
"15241879904",
"39555061929",
"102888822104",
"268211468560",
"700610325830",
"1833649443782",
"4807859710218",
"12628194814355",
"33223584816956"
] |
[
"nonn",
"changed"
] | 15 | 0 | 7 | null | null |
N. J. A. Sloane
| 2025-07-08T05:36:09 |
oeisdata/seq/A014/A014279.seq
|
89b7fa5534dd3de296e412f766568943
|
A014280
|
Number of trees on n nodes with 3 forbidden limbs of size 4, 5 and 6.
|
[
"0",
"1",
"1",
"2",
"3",
"6",
"12",
"28",
"64",
"152",
"363",
"883",
"2165",
"5375",
"13439",
"33885",
"85960",
"219398",
"562768",
"1450356",
"3753054",
"9748390",
"25406262",
"66419263",
"174128256",
"457690900",
"1205900244",
"3184274398",
"8425557609",
"22336457078",
"59319973057"
] |
[
"nonn",
"changed"
] | 17 | 0 | 4 | null | null |
N. J. A. Sloane
| 2025-07-08T05:36:14 |
oeisdata/seq/A014/A014280.seq
|
7ab5d3534eb56b7b9cab67aa47161eba
|
A014281
|
Number of trees on n nodes with forbidden limbs.
|
[
"0",
"1",
"1",
"1",
"1",
"2",
"3",
"4",
"9",
"18",
"40",
"84",
"189",
"425",
"986",
"2298",
"5465",
"13072",
"31661",
"77173",
"189697",
"468969",
"1166720",
"2916983",
"7329321",
"18494428",
"46859177",
"119161865",
"304076055",
"778399130",
"1998552928",
"5145515877",
"13282204144",
"34368982552",
"89136810772"
] |
[
"nonn",
"changed"
] | 16 | 0 | 6 | null | null |
N. J. A. Sloane
| 2025-07-08T05:36:20 |
oeisdata/seq/A014/A014281.seq
|
23334f83de7d40b51b3a72a17516c4f7
|
A014282
|
Inverse of 273rd cyclotomic polynomial.
|
[
"1",
"-1",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"-1",
"1",
"1",
"-1",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"-1",
"1",
"1",
"-1",
"0",
"1",
"-1",
"0",
"1",
"0",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 17 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014282.seq
|
46f2c32e4346170676e9e69b9e0ebe23
|
A014283
|
a(n) = Fibonacci(n) - n^2.
|
[
"0",
"0",
"-3",
"-7",
"-13",
"-20",
"-28",
"-36",
"-43",
"-47",
"-45",
"-32",
"0",
"64",
"181",
"385",
"731",
"1308",
"2260",
"3820",
"6365",
"10505",
"17227",
"28128",
"45792",
"74400",
"120717",
"195689",
"317027",
"513388",
"831140",
"1345308",
"2177285",
"3523489",
"5701731",
"9226240",
"14929056",
"24156448",
"39086725",
"63244465"
] |
[
"sign",
"easy"
] | 42 | 0 | 3 |
[
"A000045",
"A000290",
"A014283"
] | null |
Alex Fink
| 2025-04-10T03:07:32 |
oeisdata/seq/A014/A014283.seq
|
ad780f2fe3429f77c741c6cf6ff2122f
|
A014284
|
Partial sums of primes, if 1 is regarded as a prime (as it was until quite recently, see A008578).
|
[
"1",
"3",
"6",
"11",
"18",
"29",
"42",
"59",
"78",
"101",
"130",
"161",
"198",
"239",
"282",
"329",
"382",
"441",
"502",
"569",
"640",
"713",
"792",
"875",
"964",
"1061",
"1162",
"1265",
"1372",
"1481",
"1594",
"1721",
"1852",
"1989",
"2128",
"2277",
"2428",
"2585",
"2748",
"2915",
"3088",
"3267",
"3448",
"3639",
"3832",
"4029"
] |
[
"nonn",
"easy"
] | 51 | 1 | 2 |
[
"A007504",
"A008578",
"A014284",
"A036439",
"A051349",
"A175965",
"A175966",
"A175967",
"A175968",
"A175969",
"A175970"
] | null |
Deepan Majmudar (dmajmuda(AT)esq.com)
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014284.seq
|
9fc574eebc3e417e1e9b9d98fa9b9d43
|
A014285
|
a(n) = Sum_{j=1..n} j*prime(j).
|
[
"2",
"8",
"23",
"51",
"106",
"184",
"303",
"455",
"662",
"952",
"1293",
"1737",
"2270",
"2872",
"3577",
"4425",
"5428",
"6526",
"7799",
"9219",
"10752",
"12490",
"14399",
"16535",
"18960",
"21586",
"24367",
"27363",
"30524",
"33914",
"37851",
"42043",
"46564",
"51290",
"56505",
"61941",
"67750",
"73944",
"80457",
"87377",
"94716",
"102318"
] |
[
"nonn",
"easy"
] | 38 | 1 | 1 |
[
"A007504",
"A014148",
"A014285",
"A033286"
] | null |
N. J. A. Sloane
| 2024-08-19T11:58:32 |
oeisdata/seq/A014/A014285.seq
|
af50180966d72e273c3fed07b7e84342
|
A014286
|
a(n) = Sum_{j=0..n} j*Fibonacci(j).
|
[
"0",
"1",
"3",
"9",
"21",
"46",
"94",
"185",
"353",
"659",
"1209",
"2188",
"3916",
"6945",
"12223",
"21373",
"37165",
"64314",
"110826",
"190265",
"325565",
"555431",
"945073",
"1604184",
"2717016",
"4592641",
"7748859",
"13052145",
"21950853",
"36863494",
"61824694",
"103559033",
"173264921",
"289575995",
"483474153"
] |
[
"nonn",
"easy"
] | 52 | 0 | 3 |
[
"A000045",
"A014286",
"A045925",
"A143061",
"A282464"
] | null |
N. J. A. Sloane
| 2025-06-19T15:59:20 |
oeisdata/seq/A014/A014286.seq
|
f40c9a709d2b454a19c6913309d1fc06
|
A014287
|
Value of the name of n as a Roman number, keeping only relevant letters, zero if none (v=u). French version.
|
[
"5",
"505",
"1",
"5",
"101",
"9",
"0",
"6",
"5",
"509",
"0",
"505",
"1",
"5",
"6",
"1",
"509",
"515",
"514",
"6",
"9",
"509",
"7",
"9",
"105",
"15",
"6",
"10",
"9",
"0",
"5",
"505",
"1",
"5",
"101",
"9",
"0",
"6",
"5",
"5",
"10",
"500",
"6",
"10",
"96",
"14",
"5",
"11",
"10",
"104",
"109",
"599",
"105",
"109",
"195",
"113",
"104",
"110",
"109",
"9",
"14",
"494",
"10",
"14"
] |
[
"nonn",
"word"
] | 13 | 1 | 1 |
[
"A002904",
"A014287"
] | null |
Olivier Gérard
| 2018-10-19T09:57:08 |
oeisdata/seq/A014/A014287.seq
|
c37e5e72f09286f65a90514d6ce26670
|
A014288
|
a(n) = floor(Sum_{k=0..n} k!/2), or floor( A003422(n+1)/2 ).
|
[
"0",
"1",
"2",
"5",
"17",
"77",
"437",
"2957",
"23117",
"204557",
"2018957",
"21977357",
"261478157",
"3374988557",
"46964134157",
"700801318157",
"11162196262157",
"189005910310157",
"3390192763174157",
"64212742967590157",
"1280663747055910157",
"26826134832910630157",
"588826498721714470157"
] |
[
"nonn"
] | 62 | 0 | 3 |
[
"A003422",
"A007489",
"A014288",
"A067078"
] | null |
N. J. A. Sloane
| 2023-11-02T14:20:16 |
oeisdata/seq/A014/A014288.seq
|
c1664aabcf934291f03d4c1a769c864d
|
A014289
|
Inverse of 280th cyclotomic polynomial.
|
[
"1",
"0",
"0",
"0",
"-1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"-1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"-1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"-1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014289.seq
|
212c7a7bf342f1041bb35c8d3ed69dd1
|
A014290
|
Submitted to the OEIS as "Seen on a billboard in England, definition unknown".
|
[
"2",
"4",
"9",
"16",
"15"
] |
[
"dead"
] | 6 | 1 | 1 | null | null | null | 2009-01-09T03:00:00 |
oeisdata/seq/A014/A014290.seq
|
36962d134f7854e82f0c65fbf15dde70
|
A014291
|
Imaginary Rabbits: imaginary part of a(0)=i; a(1)=-i; a(n) = a(n-1) + i*a(n-2), with i = sqrt(-1).
|
[
"1",
"-1",
"-1",
"-1",
"-2",
"-2",
"-1",
"1",
"5",
"11",
"18",
"24",
"25",
"15",
"-13",
"-65",
"-142",
"-234",
"-313",
"-327",
"-199",
"163",
"838",
"1840",
"3041",
"4079",
"4279",
"2639",
"-2042",
"-10802",
"-23841",
"-39519",
"-53155",
"-55989",
"-34982",
"25544",
"139225",
"308895",
"513547",
"692655"
] |
[
"sign",
"easy"
] | 25 | 0 | 5 |
[
"A014291",
"A128099"
] | null |
Olivier Gérard
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014291.seq
|
f39f13624b0c5db9ec1bf9f26147bb32
|
A014292
|
a(n) = 2*a(n-1) - a(n-2) - a(n-4) with a(0) = a(1) = 0, a(2) = 1, a(3) = 2.
|
[
"0",
"0",
"1",
"2",
"3",
"4",
"4",
"2",
"-3",
"-12",
"-25",
"-40",
"-52",
"-52",
"-27",
"38",
"155",
"324",
"520",
"678",
"681",
"360",
"-481",
"-2000",
"-4200",
"-6760",
"-8839",
"-8918",
"-4797",
"6084",
"25804",
"54442",
"87877",
"115228",
"116775",
"63880",
"-76892",
"-332892",
"-705667",
"-1142322"
] |
[
"sign"
] | 22 | 0 | 4 |
[
"A014292",
"A104862"
] | null |
N. J. A. Sloane
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014292.seq
|
4a0d9c8954b6c55344d8ce685b909d57
|
A014293
|
a(n) = n^(n+1) - n + 1.
|
[
"1",
"1",
"7",
"79",
"1021",
"15621",
"279931",
"5764795",
"134217721",
"3486784393",
"99999999991",
"3138428376711",
"106993205379061",
"3937376385699277",
"155568095557812211",
"6568408355712890611",
"295147905179352825841",
"14063084452067724990993"
] |
[
"nonn",
"easy",
"nice"
] | 47 | 0 | 3 | null | null |
Russ Cox
| 2025-04-17T01:56:11 |
oeisdata/seq/A014/A014293.seq
|
1b276bbfd4cd198025f8c824b6285823
|
A014294
|
Inverse of 285th cyclotomic polynomial.
|
[
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"0",
"1",
"-1",
"1",
"0",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014294.seq
|
a2238d972a6c936bd08286caa18bcfae
|
A014295
|
Inverse of 286th cyclotomic polynomial.
|
[
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 15 | 0 | 1 | null | null |
Simon Plouffe
| 2023-04-20T14:54:46 |
oeisdata/seq/A014/A014295.seq
|
544d00da8ef63388cbe96fed8c6cd365
|
A014296
|
Inverse of 287th cyclotomic polynomial.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 13 | 0 | 1 | null | null |
Simon Plouffe
| 2022-09-08T08:44:39 |
oeisdata/seq/A014/A014296.seq
|
8f269696f58158e0e4f50a8990766e13
|
A014297
|
a(n) = n! * C(n+2, 2) * 2^(n+1).
|
[
"2",
"12",
"96",
"960",
"11520",
"161280",
"2580480",
"46448640",
"928972800",
"20437401600",
"490497638400",
"12752938598400",
"357082280755200",
"10712468422656000",
"342798989524992000",
"11655165643849728000",
"419585963178590208000",
"15944266600786427904000",
"637770664031457116160000"
] |
[
"nonn",
"easy"
] | 57 | 0 | 1 |
[
"A014297",
"A052564",
"A088312"
] | null |
Emeric Deutsch
| 2025-03-19T14:27:54 |
oeisdata/seq/A014/A014297.seq
|
776a1512445316609c58f66a2959d82a
|
A014298
|
a(n) = 2^n * (3n)! / (2n+1)!.
|
[
"1",
"2",
"24",
"576",
"21120",
"1048320",
"65802240",
"5000970240",
"446557224960",
"45830873088000",
"5316381278208000",
"687893507997696000",
"98231192942070988800",
"15345895252950201139200",
"2603510504983275503616000",
"476694375041453927694336000",
"93692112621783944697741312000"
] |
[
"nonn",
"easy"
] | 21 | 0 | 2 | null | null |
Igor Pak
| 2025-03-01T17:44:10 |
oeisdata/seq/A014/A014298.seq
|
974ab55a40a375163f54e677fd48dd41
|
A014299
|
Inverse of 290th cyclotomic polynomial.
|
[
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"-1",
"1",
"-1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
] |
[
"sign",
"easy"
] | 15 | 0 | 1 | null | null |
Simon Plouffe
| 2023-04-20T14:47:29 |
oeisdata/seq/A014/A014299.seq
|
6896561f8ec8d504cb4ab161a36640a5
|
A014300
|
Number of nodes of odd outdegree in all ordered rooted (planar) trees with n edges.
|
[
"1",
"2",
"7",
"24",
"86",
"314",
"1163",
"4352",
"16414",
"62292",
"237590",
"909960",
"3497248",
"13480826",
"52097267",
"201780224",
"783051638",
"3044061116",
"11851853042",
"46208337584",
"180383564228",
"704961896036",
"2757926215742",
"10799653176704",
"42326626862636",
"166021623024584",
"651683311373788"
] |
[
"nonn",
"nice",
"easy"
] | 122 | 1 | 2 |
[
"A000957",
"A000984",
"A014300",
"A059481",
"A072547",
"A079935",
"A119259",
"A119307",
"A333564"
] | null |
Emeric Deutsch
| 2023-11-25T07:35:07 |
oeisdata/seq/A014/A014300.seq
|
6a6748170c2e353d5c6a64fafa3fce1d
|
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