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
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
A377704
|
a(n) = binomial(Fibonacci(n)+Fibonacci(n+1)-2,Fibonacci(n)-1).
|
[
"1",
"1",
"3",
"15",
"330",
"50388",
"225792840",
"202355008436035",
"1051518440185020535448910",
"6295006026005594769305465540976338825800",
"250690498666352364302787619036257555981545221373940020366174361300",
"76323919118339641225070197870691336391548146418602896138838604379490915124967820851616650659494440178513500"
] |
[
"nonn"
] | 24 | 1 | 3 |
[
"A000045",
"A000984",
"A001700",
"A377704"
] | null |
Darío Clavijo, Nov 04 2024
| 2024-11-26T08:42:00 |
oeisdata/seq/A377/A377704.seq
|
948ae4f15c1b8d5c14c84b2d3602ee1f
|
A377705
|
G.f. A(x) satisfies A(x) = 1 + x/A(x)^2 * (1 - A(x) + A(x)^3).
|
[
"1",
"1",
"0",
"2",
"-3",
"12",
"-35",
"121",
"-413",
"1464",
"-5265",
"19249",
"-71236",
"266443",
"-1005511",
"3824055",
"-14641264",
"56389272",
"-218315173",
"849170605",
"-3316817080",
"13004273475",
"-51160638706",
"201901154910",
"-799059730844",
"3170706566751",
"-12611882813645",
"50277271079611"
] |
[
"sign"
] | 26 | 0 | 4 |
[
"A115344",
"A127897",
"A364758",
"A365225",
"A371889",
"A377705",
"A378892"
] | null |
Seiichi Manyama, Dec 12 2024
| 2024-12-13T09:40:31 |
oeisdata/seq/A377/A377705.seq
|
63480af4edebc4072df8b647f41a5165
|
A377706
|
G.f. A(x) satisfies A(x) = 1 + x/A(x)^3 * (1 - A(x) + A(x)^4).
|
[
"1",
"1",
"0",
"3",
"-6",
"28",
"-105",
"444",
"-1897",
"8338",
"-37305",
"169471",
"-779537",
"3623500",
"-16993990",
"80316081",
"-382136133",
"1828896726",
"-8798796709",
"42528048930",
"-206413678447",
"1005623593109",
"-4916026689088",
"24106987842416",
"-118551374861525",
"584526569727010",
"-2888995759466360"
] |
[
"sign"
] | 23 | 0 | 4 |
[
"A317133",
"A364759",
"A371890",
"A377458",
"A377706",
"A378920",
"A378958"
] | null |
Seiichi Manyama, Dec 12 2024
| 2024-12-13T09:40:35 |
oeisdata/seq/A377/A377706.seq
|
8117543ca6418040d447a567e1827b0f
|
A377707
|
Numbers k that have a record number of divisors d such that gcd(d, k/d) is a square.
|
[
"1",
"2",
"6",
"30",
"210",
"1680",
"2310",
"18480",
"30030",
"240240",
"480480",
"3843840",
"4084080",
"8168160",
"65345280",
"77597520",
"155195040",
"1241560320",
"1784742960",
"3569485920",
"28555887360",
"51757545840",
"103515091680",
"828120733440",
"1604483921040",
"3208967842080",
"25671742736640",
"51343485473280"
] |
[
"nonn"
] | 8 | 1 | 2 |
[
"A025487",
"A365171",
"A377707"
] | null |
Amiram Eldar, Nov 04 2024
| 2024-11-04T20:48:21 |
oeisdata/seq/A377/A377707.seq
|
421ea0963b0ea7b5cf10bef00cabcadf
|
A377708
|
Numbers k that have a record number of divisors d such that gcd(d, k/d) is an exponentially odd number (A268335).
|
[
"1",
"2",
"4",
"6",
"12",
"24",
"36",
"60",
"120",
"180",
"360",
"840",
"1260",
"2520",
"6300",
"7560",
"12600",
"27720",
"69300",
"83160",
"138600",
"360360",
"900900",
"1081080",
"1801800",
"5405400",
"12612600",
"18378360",
"30630600",
"91891800",
"214414200",
"349188840",
"581981400",
"1745944200",
"4073869800",
"8031343320",
"12221609400"
] |
[
"nonn"
] | 8 | 1 | 2 |
[
"A025487",
"A268335",
"A365173",
"A365681",
"A377140",
"A377708"
] | null |
Amiram Eldar, Nov 04 2024
| 2024-11-04T20:49:35 |
oeisdata/seq/A377/A377708.seq
|
dddf01a243cdbe134c1720f30cd11f5b
|
A377709
|
Numbers that have a record number of infinitary divisors that are powerful (A001694).
|
[
"1",
"4",
"8",
"36",
"72",
"128",
"216",
"1152",
"3456",
"27000",
"28800",
"86400",
"279936",
"432000",
"4233600",
"6998400",
"21168000",
"34992000",
"148176000",
"342921600",
"1714608000",
"8957952000",
"12002256000",
"197222256000",
"207467568000",
"438939648000",
"1071630000000",
"1452272976000",
"3072577536000",
"7501410000000"
] |
[
"nonn"
] | 9 | 1 | 2 |
[
"A001694",
"A025487",
"A037445",
"A360721",
"A377709"
] | null |
Amiram Eldar, Nov 04 2024
| 2024-11-04T20:50:03 |
oeisdata/seq/A377/A377709.seq
|
f5681b17de9092ca5dc81e2502690cfb
|
A377710
|
Numbers that have a record number of infinitary divisors that are exponentially odd numbers (A268335).
|
[
"1",
"2",
"6",
"24",
"30",
"120",
"210",
"840",
"2310",
"7560",
"9240",
"30030",
"83160",
"120120",
"510510",
"1081080",
"1921920",
"2042040",
"9699690",
"18378360",
"32672640",
"38798760",
"223092870",
"349188840",
"620780160",
"892371480",
"5587021440",
"6469693230",
"8031343320",
"14277943680",
"25878772920",
"128501493120"
] |
[
"nonn"
] | 12 | 1 | 2 |
[
"A025487",
"A268335",
"A322484",
"A363825",
"A377710"
] | null |
Amiram Eldar, Nov 04 2024
| 2025-06-02T15:28:24 |
oeisdata/seq/A377/A377710.seq
|
543f537b6fbe710169f8a20212a17e9f
|
A377711
|
Numbers that have a record number of (1+phi)-divisors (A061389).
|
[
"1",
"2",
"6",
"24",
"30",
"96",
"120",
"210",
"480",
"840",
"1920",
"2310",
"3360",
"9240",
"13440",
"30030",
"36960",
"120120",
"147840",
"332640",
"480480",
"1330560",
"1921920",
"4324320",
"8168160",
"17297280",
"30750720",
"32672640",
"73513440",
"155195040",
"294053760",
"522762240",
"620780160",
"1396755360",
"2646483840"
] |
[
"nonn"
] | 7 | 1 | 2 |
[
"A025487",
"A061389",
"A307004",
"A377711"
] | null |
Amiram Eldar, Nov 04 2024
| 2024-11-04T20:50:30 |
oeisdata/seq/A377/A377711.seq
|
ff70b5d7b0abd92146b17cf2ac0cef2b
|
A377712
|
a(n) is the least divisor of n with as many decimal digits as n.
|
[
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"10",
"21",
"11",
"23",
"12",
"25",
"13",
"27",
"14",
"29",
"10",
"31",
"16",
"11",
"17",
"35",
"12",
"37",
"19",
"13",
"10",
"41",
"14",
"43",
"11",
"15",
"23",
"47",
"12",
"49",
"10",
"17",
"13",
"53",
"18",
"11",
"14",
"19",
"29",
"59",
"10",
"61",
"31",
"21",
"16",
"13",
"11",
"67"
] |
[
"nonn",
"base",
"easy"
] | 22 | 1 | 10 |
[
"A055642",
"A109940",
"A377712"
] | null |
Rémy Sigrist, Nov 04 2024
| 2024-11-07T02:27:45 |
oeisdata/seq/A377/A377712.seq
|
651b6a1bbd62a82f6b3a22d8c17d452d
|
A377713
|
Squarefree composite k such that floor(log n/log lpf(k)) <= omega(k), where lpf = A020639 and omega = A001221.
|
[
"6",
"15",
"21",
"35",
"55",
"65",
"77",
"85",
"91",
"95",
"115",
"119",
"133",
"143",
"161",
"187",
"203",
"209",
"217",
"221",
"247",
"253",
"259",
"287",
"299",
"301",
"319",
"323",
"329",
"341",
"377",
"385",
"391",
"403",
"407",
"437",
"451",
"455",
"473",
"481",
"493",
"517",
"527",
"533",
"551",
"559",
"583",
"589",
"595",
"611",
"629",
"649",
"667",
"671",
"689"
] |
[
"nonn",
"easy"
] | 6 | 1 | 1 |
[
"A000961",
"A001221",
"A002110",
"A007947",
"A020639",
"A120944",
"A376846",
"A377590",
"A377591",
"A377713"
] | null |
Michael De Vlieger, Nov 04 2024
| 2024-11-13T17:17:29 |
oeisdata/seq/A377/A377713.seq
|
5d64ab8416329d4c05a8cab6190a3d2a
|
A377714
|
Cogrowth sequence for the 8-element group C4 X C2 = <S,T | S^4, T^2, [S,T]>.
|
[
"1",
"1",
"2",
"16",
"72",
"256",
"992",
"4096",
"16512",
"65536",
"261632",
"1048576",
"4196352",
"16777216",
"67100672",
"268435456",
"1073774592",
"4294967296",
"17179738112",
"68719476736",
"274878431232",
"1099511627776",
"4398044413952",
"17592186044416",
"70368752566272",
"281474976710656"
] |
[
"nonn"
] | 7 | 0 | 3 |
[
"A377627",
"A377714",
"C2",
"C6"
] | null |
Sean A. Irvine, Nov 04 2024
| 2024-11-10T20:40:44 |
oeisdata/seq/A377/A377714.seq
|
78cad5a2413b6bf7b9491ef4c203ab0b
|
A377715
|
Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,3,4} for all i=1,...,n.
|
[
"1",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"0",
"0",
"1",
"3",
"1",
"0",
"0",
"1",
"6",
"6",
"1",
"1",
"1",
"10",
"20",
"10",
"5",
"6",
"15",
"50",
"50",
"25",
"30",
"36",
"105",
"175",
"125",
"115",
"141",
"231",
"490",
"525",
"435",
"541",
"673",
"1246",
"1820",
"1695",
"1901",
"2361",
"3361",
"5501",
"6301",
"6601",
"8295",
"10440",
"15820",
"21410",
"23286"
] |
[
"easy",
"nonn"
] | 9 | 0 | 12 |
[
"A376743",
"A377715"
] | null |
Michael A. Allen, Nov 04 2024
| 2024-11-08T11:37:56 |
oeisdata/seq/A377/A377715.seq
|
d28849627bd7b05dc2f3c8a25ffd3a73
|
A377716
|
E.g.f. satisfies A(x) = (1 + (exp(x) - 1) * A(x))^2.
|
[
"1",
"2",
"12",
"116",
"1584",
"28172",
"619872",
"16289996",
"498428544",
"17417438252",
"684759380832",
"29925135793676",
"1439467532867904",
"75591768584407532",
"4303733247493423392",
"264082643528395550156",
"17375242687235713361664",
"1220318925238762558532012",
"91128522664443184593699552"
] |
[
"nonn"
] | 8 | 0 | 2 |
[
"A000670",
"A052895",
"A377692",
"A377716",
"A377717"
] | null |
Seiichi Manyama, Nov 04 2024
| 2024-11-05T08:11:41 |
oeisdata/seq/A377/A377716.seq
|
5c049b4182410b73b6a16ab93dad6be5
|
A377717
|
E.g.f. satisfies A(x) = (1 + (exp(x) - 1) * A(x))^3.
|
[
"1",
"3",
"27",
"405",
"8703",
"245493",
"8608167",
"361640205",
"17727268383",
"993980112453",
"62774530115607",
"4410751512076605",
"341353603094403663",
"28856102576884010613",
"2645807719152819131847",
"261551674681092859354605",
"27732033282190658330940543",
"3139533157528775981685527973"
] |
[
"nonn"
] | 8 | 0 | 2 |
[
"A000670",
"A367161",
"A377693",
"A377716",
"A377717"
] | null |
Seiichi Manyama, Nov 04 2024
| 2024-11-05T08:11:37 |
oeisdata/seq/A377/A377717.seq
|
c3f442d912e1f97ca85edec50fcc0f50
|
A377718
|
Numbers k such that (41^k - 2^k)/39 is prime.
|
[
"2",
"41",
"97",
"131",
"2411",
"7321"
] |
[
"nonn",
"hard",
"more"
] | 5 | 1 | 1 |
[
"A062587",
"A062589",
"A127996",
"A127997",
"A128344",
"A204940",
"A217320",
"A225807",
"A229542",
"A375161",
"A375236",
"A377031",
"A377718"
] | null |
Robert Price, Nov 04 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377718.seq
|
ab5fe995e9b979bc0e37c450db80763a
|
A377719
|
E.g.f. satisfies A(x) = (1 + x * (exp(x) - 1) * A(x))^2.
|
[
"1",
"0",
"4",
"6",
"128",
"610",
"12192",
"112154",
"2416416",
"34337538",
"827541200",
"16047333082",
"436958019984",
"10718568174626",
"329594991463584",
"9737689680629850",
"336439401299953472",
"11581626068262440194",
"446492838289046854320",
"17496904148975860376474",
"747070411957344952492080"
] |
[
"nonn"
] | 10 | 0 | 3 |
[
"A371142",
"A377438",
"A377719"
] | null |
Seiichi Manyama, Nov 04 2024
| 2024-11-05T08:11:31 |
oeisdata/seq/A377/A377719.seq
|
ec33c4112d5a6f39ee7b67c9cb06ef7a
|
A377720
|
E.g.f. satisfies A(x) = (1 + x * (exp(x) - 1) * A(x))^3.
|
[
"1",
"0",
"6",
"9",
"300",
"1455",
"44658",
"430941",
"13821048",
"213210171",
"7400153550",
"160981385433",
"6126989357844",
"173482562393751",
"7273217782923498",
"253885773923800245",
"11726322434886352368",
"485729504795911017075",
"24658741688798553168582",
"1179026561203600147075857"
] |
[
"nonn"
] | 10 | 0 | 3 |
[
"A371143",
"A377691",
"A377720"
] | null |
Seiichi Manyama, Nov 04 2024
| 2024-11-05T08:11:45 |
oeisdata/seq/A377/A377720.seq
|
adcc0043ce7e4d07c44de91a51c432fb
|
A377721
|
Numbers that are not of the form k(k+1)(2k+1)/6 + k.
|
[
"1",
"3",
"4",
"5",
"6",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"27",
"28",
"29",
"30",
"31",
"32",
"33",
"35",
"36",
"37",
"38",
"39",
"40",
"41",
"42",
"43",
"44",
"45",
"46",
"47",
"48",
"49",
"50",
"51",
"52",
"53",
"54",
"55",
"56",
"57",
"58",
"59",
"61",
"62",
"63",
"64",
"65",
"66",
"67",
"68",
"69",
"70",
"71",
"72"
] |
[
"nonn"
] | 6 | 1 | 2 |
[
"A000330",
"A074279",
"A145066",
"A377721"
] | null |
Chai Wah Wu, Nov 04 2024
| 2024-11-05T12:19:20 |
oeisdata/seq/A377/A377721.seq
|
8444b2411bd8ed02035f10964b0cb644
|
A377722
|
n appears n^4 times.
|
[
"1",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"2",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3",
"3"
] |
[
"nonn"
] | 11 | 1 | 2 |
[
"A002024",
"A074279",
"A108582",
"A377722"
] | null |
Chai Wah Wu, Nov 04 2024
| 2024-11-06T04:31:36 |
oeisdata/seq/A377/A377722.seq
|
f0fd3107e07a030e870041fe6eaa89ac
|
A377723
|
Numbers whose number of prime factors (counted with repetition) is greater than or equal to its smallest prime factor.
|
[
"4",
"6",
"8",
"10",
"12",
"14",
"16",
"18",
"20",
"22",
"24",
"26",
"27",
"28",
"30",
"32",
"34",
"36",
"38",
"40",
"42",
"44",
"45",
"46",
"48",
"50",
"52",
"54",
"56",
"58",
"60",
"62",
"63",
"64",
"66",
"68",
"70",
"72",
"74",
"75",
"76",
"78",
"80",
"81",
"82",
"84",
"86",
"88",
"90",
"92",
"94",
"96",
"98",
"99",
"100",
"102",
"104",
"105",
"106",
"108",
"110",
"112",
"114",
"116"
] |
[
"nonn"
] | 16 | 1 | 1 |
[
"A001222",
"A020639",
"A091371",
"A091375",
"A091376",
"A091377",
"A377723"
] | null |
James C. McMahon, Dec 28 2024
| 2025-01-11T04:14:54 |
oeisdata/seq/A377/A377723.seq
|
cc9d6be36b97313d9c1e6b3980b6de40
|
A377724
|
Smallest k such that 4^(5*4^n) - k is a safe prime.
|
[
"5",
"437",
"13709",
"40169",
"574133"
] |
[
"nonn",
"more"
] | 13 | 0 | 1 |
[
"A005385",
"A057821",
"A181356",
"A335313",
"A376946",
"A377724"
] | null |
J.W.L. (Jan) Eerland, Nov 05 2024
| 2024-11-14T08:23:28 |
oeisdata/seq/A377/A377724.seq
|
5edca15716b6f5501c93e7168ebb809f
|
A377725
|
Length of the short leg of the unique primitive Pythagorean triple whose inradius is A002315(n) and such that its long leg and its hypotenuse are consecutive natural numbers.
|
[
"3",
"15",
"83",
"479",
"2787",
"16239",
"94643",
"551615",
"3215043",
"18738639",
"109216787",
"636562079",
"3710155683",
"21624372015",
"126036076403",
"734592086399",
"4281516441987",
"24954506565519",
"145445522951123",
"847718631141215",
"4940866263896163",
"28797478952235759",
"167844007449518387"
] |
[
"nonn",
"easy",
"changed"
] | 18 | 1 | 1 |
[
"A002315",
"A377016",
"A377017",
"A377725",
"A377726",
"A385977"
] | null |
Miguel-Ángel Pérez García-Ortega, Nov 05 2024
| 2025-07-13T21:52:47 |
oeisdata/seq/A377/A377725.seq
|
ac9a838d9aec8388d85b507fb387783b
|
A377726
|
Lengths of the long leg of the unique primitive Pythagorean triple (x,y,z) such that (x-y+z)/2 is A002315(n) and such that its long leg and its hypotenuse are consecutive natural numbers.
|
[
"84",
"3280",
"113764",
"3878112",
"131820084",
"4478459440",
"152138450884",
"5168244315840",
"175568258308884",
"5964153062868112",
"202605638937276964",
"6882627588628286880",
"233806732478308836084",
"7942546277279354556400",
"269812766698548756220804",
"9165691521493946935370112"
] |
[
"nonn",
"easy",
"changed"
] | 17 | 1 | 1 |
[
"A002315",
"A362545",
"A377016",
"A377017",
"A377725",
"A377726"
] | null |
Miguel-Ángel Pérez García-Ortega, Nov 05 2024
| 2025-07-14T22:17:02 |
oeisdata/seq/A377/A377726.seq
|
b2f81d1143d49bfbc361ca5c5e06cb91
|
A377727
|
Number of digit patterns of length n that satisfy no divisibility rules but do not generate primes.
|
[
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"32",
"9",
"207"
] |
[
"nonn",
"base",
"more"
] | 44 | 1 | 10 |
[
"A164864",
"A266991",
"A267013",
"A376918",
"A377727"
] | null |
Dmytro Inosov, Nov 05 2024
| 2025-01-06T15:13:54 |
oeisdata/seq/A377/A377727.seq
|
056772720021c35ac31de2a877e23589
|
A377728
|
Convolution of Leonardo numbers with Jacobsthal numbers.
|
[
"0",
"1",
"2",
"7",
"16",
"39",
"86",
"189",
"402",
"847",
"1760",
"3631",
"7438",
"15165",
"30794",
"62343",
"125904",
"253783",
"510758",
"1026685",
"2061730",
"4136991",
"8295872",
"16627167",
"33311646",
"66716029",
"133582106",
"267406999",
"535206832",
"1071049287",
"2143127030",
"4287918141",
"8578528818",
"17161414255"
] |
[
"nonn",
"easy"
] | 39 | 0 | 3 |
[
"A001045",
"A001595",
"A377728"
] | null |
Prabha Sivaramannair, Nov 05 2024
| 2025-02-03T00:13:51 |
oeisdata/seq/A377/A377728.seq
|
a2c160e133c3671aa14d9c9b9097aee1
|
A377729
|
a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly 2 ways.
|
[
"19",
"90",
"162",
"299",
"509",
"816",
"1248",
"1837",
"2619",
"3634",
"4926",
"6543",
"8537",
"10964",
"13884",
"17361",
"21463",
"26262",
"31834",
"38259",
"45621",
"54008",
"63512",
"74229",
"86259",
"99706",
"114678",
"131287",
"149649",
"169884",
"192116",
"216473",
"243087",
"272094",
"303634",
"337851",
"374893",
"414912",
"458064",
"504509"
] |
[
"nonn"
] | 27 | 3 | 1 |
[
"A006484",
"A025377",
"A057145",
"A350405",
"A374144",
"A374256",
"A374287",
"A377729"
] | null |
Ilya Gutkovskiy, Nov 05 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377729.seq
|
42f79c5b9000b9a170c0cbd130b1b24d
|
A377730
|
Number of integers less than n that have the same greatest prime factor as n.
|
[
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"2",
"2",
"1",
"0",
"3",
"0",
"1",
"2",
"3",
"0",
"4",
"0",
"3",
"2",
"1",
"0",
"5",
"4",
"1",
"6",
"3",
"0",
"5",
"0",
"4",
"2",
"1",
"4",
"7",
"0",
"1",
"2",
"6",
"0",
"5",
"0",
"3",
"7",
"1",
"0",
"8",
"6",
"8",
"2",
"3",
"0",
"9",
"4",
"7",
"2",
"1",
"0",
"9",
"0",
"1",
"8",
"5",
"4",
"5",
"0",
"3",
"2",
"9",
"0",
"10",
"0",
"1",
"10",
"3",
"6",
"5",
"0",
"11",
"11",
"1",
"0",
"10",
"4",
"1",
"2",
"7",
"0",
"12"
] |
[
"nonn"
] | 8 | 1 | 8 |
[
"A006530",
"A047983",
"A078899",
"A334655",
"A335097",
"A377730",
"A377734"
] | null |
Ilya Gutkovskiy, Nov 05 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377730.seq
|
4c589f470258e5de6361cbae3c84ebad
|
A377731
|
Decimal expansion of 4 * sqrt(2*Pi) * Gamma(5/4) / (3 * Gamma(3/4)).
|
[
"2",
"4",
"7",
"2",
"0",
"9",
"9",
"5",
"6",
"9",
"7",
"3",
"5",
"1",
"6",
"2",
"5",
"5",
"7",
"9",
"1",
"1",
"8",
"0",
"0",
"4",
"6",
"2",
"9",
"2",
"7",
"0",
"1",
"3",
"3",
"9",
"4",
"9",
"5",
"6",
"7",
"9",
"8",
"4",
"3",
"1",
"3",
"6",
"2",
"3",
"5",
"5",
"8",
"7",
"4",
"1",
"1",
"4",
"5",
"7",
"0",
"7",
"2",
"6",
"7",
"4",
"1",
"3",
"6",
"2",
"3",
"6",
"9",
"1",
"1",
"7",
"4",
"9",
"3",
"3",
"0",
"4",
"4",
"7",
"6",
"3",
"6",
"2",
"4",
"8",
"2",
"2",
"0",
"0",
"4",
"9",
"5",
"8",
"6",
"3",
"0",
"3",
"7",
"0",
"2"
] |
[
"nonn",
"cons"
] | 6 | 1 | 1 |
[
"A019727",
"A068465",
"A068467",
"A211996",
"A377731",
"A377732"
] | null |
Amiram Eldar, Nov 05 2024
| 2024-11-06T04:39:36 |
oeisdata/seq/A377/A377731.seq
|
6bd0f2872ba3eb592b9723d93ce66ecd
|
A377732
|
Numbers k such that max{d|k, d <= sqrt(k)} + min{d|k, d >= sqrt(k)} is a square.
|
[
"3",
"4",
"14",
"18",
"20",
"39",
"46",
"55",
"60",
"63",
"64",
"94",
"114",
"136",
"150",
"154",
"155",
"156",
"158",
"183",
"203",
"243",
"258",
"275",
"291",
"295",
"299",
"308",
"315",
"320",
"323",
"324",
"328",
"334",
"444",
"446",
"490",
"544",
"558",
"570",
"579",
"580",
"583",
"584",
"588",
"594",
"598",
"600",
"695",
"710",
"718",
"799",
"855",
"878",
"903",
"904",
"938",
"943",
"955",
"959",
"975",
"978",
"979",
"988",
"999"
] |
[
"nonn"
] | 16 | 1 | 1 |
[
"A033676",
"A033677",
"A063655",
"A141046",
"A377731",
"A377732",
"A377733",
"A377736"
] | null |
Amiram Eldar, Nov 05 2024
| 2024-11-07T08:46:08 |
oeisdata/seq/A377/A377732.seq
|
889356e948de921bfe8493ba93d218b9
|
A377733
|
Numbers k such that k and k+1 are both terms in A377732.
|
[
"3",
"63",
"154",
"155",
"323",
"579",
"583",
"903",
"978",
"1023",
"2019",
"2499",
"3503",
"5174",
"5183",
"5379",
"8234",
"9603",
"11534",
"12415",
"14718",
"16383",
"20454",
"20538",
"26243",
"31930",
"39999",
"46814",
"58563",
"69719",
"82943",
"90218",
"93995",
"96663",
"102943",
"114243",
"117998",
"118979",
"124118",
"135814",
"138490",
"149879"
] |
[
"nonn"
] | 10 | 1 | 1 |
[
"A141046",
"A377732",
"A377733",
"A377736"
] | null |
Amiram Eldar, Nov 05 2024
| 2024-11-06T04:39:57 |
oeisdata/seq/A377/A377733.seq
|
31b7b50eb0521cf71944675ef21594c9
|
A377734
|
Number of integers less than n that have the same smallest prime factor as n.
|
[
"0",
"0",
"0",
"1",
"0",
"2",
"0",
"3",
"1",
"4",
"0",
"5",
"0",
"6",
"2",
"7",
"0",
"8",
"0",
"9",
"3",
"10",
"0",
"11",
"1",
"12",
"4",
"13",
"0",
"14",
"0",
"15",
"5",
"16",
"2",
"17",
"0",
"18",
"6",
"19",
"0",
"20",
"0",
"21",
"7",
"22",
"0",
"23",
"1",
"24",
"8",
"25",
"0",
"26",
"3",
"27",
"9",
"28",
"0",
"29",
"0",
"30",
"10",
"31",
"4",
"32",
"0",
"33",
"11",
"34",
"0",
"35",
"0",
"36",
"12",
"37",
"2",
"38",
"0",
"39"
] |
[
"nonn"
] | 14 | 1 | 6 |
[
"A020639",
"A038110",
"A038111",
"A047983",
"A078898",
"A334655",
"A335097",
"A377730",
"A377734"
] | null |
Ilya Gutkovskiy, Nov 05 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377734.seq
|
be82f90343119d5498b5632e081eb90f
|
A377735
|
Cogrowth sequence of the 16-element group Q8 X C2 = <S,T,U | S^4, T^4, U^2, STS^3T, S^2U^2, [S,U], [T,U]>.
|
[
"1",
"1",
"7",
"103",
"829",
"7261",
"66595",
"598627",
"5377849",
"48426745",
"435876607",
"3922582687",
"35303534581",
"317733991381",
"2859598948507",
"25736384863003",
"231627537879409",
"2084647743751921",
"18761829221081335",
"168856464809568727",
"1519708183900618669",
"13677373637498037325"
] |
[
"nonn",
"easy"
] | 30 | 0 | 3 |
[
"A047854",
"A071930",
"A377735",
"A377840",
"C2",
"C8",
"D4",
"Q8"
] | null |
Sean A. Irvine, Nov 10 2024
| 2024-11-12T12:22:24 |
oeisdata/seq/A377/A377735.seq
|
264c5eb987727028a878482daff1f4c3
|
A377736
|
Numbers k such that k, k+1 and k+2 are all terms in A377732.
|
[
"154",
"282674",
"3003599678"
] |
[
"nonn",
"more",
"bref"
] | 7 | 1 | 1 |
[
"A377732",
"A377733",
"A377736"
] | null |
Amiram Eldar, Nov 05 2024
| 2024-11-06T04:40:06 |
oeisdata/seq/A377/A377736.seq
|
8cda6d005d0561d3a64cbe9916c167f3
|
A377737
|
Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 - log(1-2*x) / 2) ).
|
[
"1",
"1",
"4",
"32",
"392",
"6504",
"136464",
"3466224",
"103425664",
"3546396288",
"137423600640",
"5939224680960",
"283254408582144",
"14777481937449984",
"837175325044101120",
"51182161648716349440",
"3358765321328869539840",
"235492308312669671424000",
"17568539556367396687183872"
] |
[
"nonn"
] | 23 | 0 | 3 |
[
"A138013",
"A201595",
"A227917",
"A370938",
"A377737",
"A377789",
"A377803"
] | null |
Seiichi Manyama, Nov 08 2024
| 2024-11-08T08:04:29 |
oeisdata/seq/A377/A377737.seq
|
bcd81ebbe6fa4d00b1828b91702d76c9
|
A377738
|
a(n) is the least m > n such that the Zeckendorf representations of m and n have the same number of terms.
|
[
"2",
"3",
"5",
"6",
"8",
"7",
"9",
"13",
"10",
"11",
"14",
"17",
"21",
"15",
"16",
"18",
"19",
"22",
"20",
"25",
"34",
"23",
"24",
"26",
"27",
"29",
"28",
"30",
"35",
"31",
"32",
"38",
"46",
"55",
"36",
"37",
"39",
"40",
"42",
"41",
"43",
"47",
"44",
"45",
"48",
"51",
"56",
"49",
"50",
"52",
"53",
"59",
"54",
"67",
"89",
"57",
"58",
"60",
"61",
"63",
"62",
"64",
"68",
"65",
"66",
"69",
"72"
] |
[
"nonn",
"base"
] | 10 | 1 | 1 |
[
"A000045",
"A003714",
"A007895",
"A014417",
"A027941",
"A057168",
"A228915",
"A377738"
] | null |
Rémy Sigrist, Nov 05 2024
| 2024-11-20T14:11:55 |
oeisdata/seq/A377/A377738.seq
|
dc68dc58067e918dc9013fc736807ed7
|
A377739
|
Array of positive integer triples (x,y,z) where the sum of their cubes equals another cubic number
|
[
"3",
"4",
"5",
"1",
"6",
"8",
"6",
"8",
"10",
"2",
"12",
"16",
"9",
"12",
"15",
"3",
"10",
"18",
"7",
"14",
"17",
"12",
"16",
"20",
"4",
"17",
"22",
"3",
"18",
"24",
"18",
"19",
"21",
"11",
"15",
"27",
"15",
"20",
"25",
"4",
"24",
"32",
"18",
"24",
"30",
"6",
"20",
"36",
"14",
"28",
"34",
"2",
"17",
"40",
"6",
"32",
"33",
"21",
"28",
"35",
"16",
"23",
"41",
"5",
"30",
"40",
"3",
"36",
"37",
"27",
"30",
"37",
"24",
"32",
"40",
"8",
"34",
"44",
"29",
"34",
"44",
"6",
"36",
"48",
"12",
"19",
"53",
"27",
"36",
"45",
"36",
"38",
"42"
] |
[
"nonn"
] | 15 | 1 | 1 |
[
"A023042",
"A096907",
"A103606",
"A226903",
"A291694",
"A377739"
] | null |
Luke Voyles, Nov 05 2024
| 2024-11-20T09:48:56 |
oeisdata/seq/A377/A377739.seq
|
11ce1bec02d9155259fff37862de83c4
|
A377740
|
E.g.f. satisfies A(x) = exp(x) * (1 + x * A(x))^2.
|
[
"1",
"3",
"19",
"199",
"2957",
"57341",
"1377175",
"39531927",
"1321803705",
"50491876825",
"2170432191491",
"103726081148339",
"5456983990544773",
"313449393386822421",
"19521567325327386831",
"1310428405901227674511",
"94325931842372734994417",
"7248016420075574268626225",
"592190617414334419733622139"
] |
[
"nonn"
] | 10 | 0 | 2 |
[
"A072597",
"A295238",
"A377574",
"A377740",
"A377741"
] | null |
Seiichi Manyama, Nov 05 2024
| 2024-11-06T04:37:11 |
oeisdata/seq/A377/A377740.seq
|
71f38db3651cfef32ef7c1d6b45d2583
|
A377741
|
E.g.f. satisfies A(x) = exp(x) * (1 + x * A(x))^3.
|
[
"1",
"4",
"37",
"583",
"13225",
"394681",
"14659537",
"652829857",
"33937422001",
"2018665692721",
"135274646371561",
"10087017309339433",
"828563190097478425",
"74348364577760978329",
"7236649495742795579809",
"759466703902106082652321",
"85492204279344776678878945",
"10275933748282019792253453025"
] |
[
"nonn"
] | 11 | 0 | 2 |
[
"A072597",
"A364983",
"A377575",
"A377740",
"A377741"
] | null |
Seiichi Manyama, Nov 05 2024
| 2024-11-06T04:37:22 |
oeisdata/seq/A377/A377741.seq
|
964712c793aade6237fe465b6fab1a3b
|
A377742
|
E.g.f. satisfies A(x) = exp(x) / (1 - x * A(x))^2.
|
[
"1",
"3",
"23",
"331",
"7133",
"205901",
"7470475",
"326932299",
"16768124217",
"986753701657",
"65548017270791",
"4852285640543639",
"396133183892522389",
"35359325061987638661",
"3426053898460864501251",
"358128187005971803014211",
"40172982580368589391407217",
"4813677071886578522596221233"
] |
[
"nonn"
] | 12 | 0 | 2 |
[
"A001339",
"A194471",
"A377503",
"A377742",
"A377743",
"A377744",
"A377745"
] | null |
Seiichi Manyama, Nov 05 2024
| 2024-11-06T04:37:33 |
oeisdata/seq/A377/A377742.seq
|
6d24b76f1603b76b4a547674f39ee6f6
|
A377743
|
E.g.f. satisfies A(x) = exp(x) / (1 - x * A(x))^3.
|
[
"1",
"4",
"43",
"853",
"25141",
"989581",
"48885187",
"2910389875",
"202958554057",
"16233163690537",
"1465257396236551",
"147359765665925143",
"16341437664329027389",
"1981169884084699982701",
"260701144663332062732491",
"37007345616327485166160651",
"5637148375602304430334748945",
"917186940500490837457393476817"
] |
[
"nonn"
] | 9 | 0 | 2 |
[
"A194471",
"A373324",
"A377504",
"A377742",
"A377743",
"A377744"
] | null |
Seiichi Manyama, Nov 06 2024
| 2024-11-06T04:37:43 |
oeisdata/seq/A377/A377743.seq
|
acc12a6bcb833cc2d84a46dce95a0ccd
|
A377744
|
E.g.f. satisfies A(x) = exp(x) / (1 - x * A(x))^4.
|
[
"1",
"5",
"69",
"1741",
"65025",
"3238401",
"202252549",
"15216086789",
"1340493558497",
"135418524663457",
"15436319894361141",
"1960277599669850517",
"274474966233168968353",
"42012725272366653895169",
"6979546631782182590117189",
"1250777360824265136694022341",
"240516661686854988775792192833"
] |
[
"nonn"
] | 10 | 0 | 2 |
[
"A194471",
"A377528",
"A377742",
"A377743",
"A377744"
] | null |
Seiichi Manyama, Nov 06 2024
| 2024-11-06T04:37:53 |
oeisdata/seq/A377/A377744.seq
|
b33c506094bfa66492cf43aa2797a17a
|
A377745
|
E.g.f. satisfies A(x) = exp(x) / (1 - x * A(x)^2)^2.
|
[
"1",
"3",
"35",
"865",
"32917",
"1699311",
"111033607",
"8788108477",
"817439352233",
"87406186549339",
"10564550856634411",
"1424421297360350169",
"211968687043802337469",
"34509326697582566247367",
"6101526326400539736369935",
"1164298084658023787974823221",
"238495519792465232104337607505"
] |
[
"nonn"
] | 9 | 0 | 2 |
[
"A001339",
"A371318",
"A377742",
"A377745"
] | null |
Seiichi Manyama, Nov 06 2024
| 2024-11-06T04:38:04 |
oeisdata/seq/A377/A377745.seq
|
afaee38955e0af16285ae38b78ccd11a
|
A377746
|
E.g.f. satisfies A(x) = exp(x) * (1 + x * A(x)^2)^2.
|
[
"1",
"3",
"31",
"637",
"19813",
"830671",
"43938067",
"2809979257",
"210946285417",
"18189526062331",
"1771938448807591",
"192475338784416469",
"23068103047077997069",
"3023954831626697490055",
"430420617664714578381019",
"66110112671342637934719121",
"10898800684623601950111879505",
"1919585083312849130822156455795"
] |
[
"nonn"
] | 7 | 0 | 2 |
[
"A377740",
"A377746"
] | null |
Seiichi Manyama, Nov 06 2024
| 2024-11-06T04:38:13 |
oeisdata/seq/A377/A377746.seq
|
20fa9b7b1f740cac32bb404419636ab4
|
A377747
|
Centered triangular numbers that are pseudoperfect (semiperfect).
|
[
"460",
"760",
"2584",
"4960",
"5860",
"14260",
"15760",
"22144",
"27136",
"28360",
"30460",
"41584",
"47260",
"49960",
"70960",
"74260",
"79696",
"99460",
"103360",
"118864",
"132760",
"137260",
"147424",
"159904",
"170860",
"175960",
"179056",
"213760",
"219460",
"261460",
"267760",
"309856",
"313960",
"320860",
"371260",
"378760",
"383296",
"428536",
"433360",
"441460",
"459544",
"486496"
] |
[
"nonn"
] | 17 | 1 | 1 |
[
"A005448",
"A005835",
"A376997",
"A377747"
] | null |
Massimo Kofler, Nov 06 2024
| 2025-01-30T15:28:05 |
oeisdata/seq/A377/A377747.seq
|
e4da755564b051d6eb3a91d0b01bdc83
|
A377748
|
a(n) = (A000217(n) - A005132(n))/2.
|
[
"0",
"0",
"0",
"0",
"4",
"4",
"4",
"4",
"12",
"12",
"22",
"22",
"34",
"34",
"48",
"48",
"64",
"64",
"64",
"64",
"84",
"84",
"106",
"129",
"129",
"154",
"154",
"181",
"181",
"210",
"210",
"241",
"241",
"241",
"241",
"276",
"276",
"313",
"351",
"351",
"391",
"391",
"433",
"433",
"477",
"477",
"523",
"523",
"571",
"571",
"621",
"621",
"673",
"673",
"727",
"727",
"783",
"783",
"841",
"841"
] |
[
"nonn"
] | 32 | 0 | 5 |
[
"A000217",
"A005132",
"A160356",
"A377748"
] | null |
Paul Curtz, Nov 06 2024
| 2024-11-18T18:27:46 |
oeisdata/seq/A377/A377748.seq
|
028e7b0b21dc25fb96800fce6e046e66
|
A377749
|
Number of edge cuts in the n X n black bishop graph.
|
[
"0",
"1",
"48",
"10652",
"2077934208",
"11652660452817664",
"4071032362137611370484875264"
] |
[
"nonn",
"more"
] | 7 | 1 | 3 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2025-05-28T16:35:57 |
oeisdata/seq/A377/A377749.seq
|
d0870b03b8133ddbcce8390834ab1f3b
|
A377750
|
Decimal expansion of the surface area of a truncated icosahedron with unit edge length.
|
[
"7",
"2",
"6",
"0",
"7",
"2",
"5",
"3",
"0",
"3",
"4",
"1",
"3",
"3",
"9",
"2",
"1",
"8",
"7",
"8",
"9",
"3",
"1",
"5",
"3",
"3",
"9",
"7",
"3",
"8",
"3",
"9",
"4",
"8",
"6",
"2",
"0",
"1",
"1",
"7",
"2",
"6",
"4",
"7",
"6",
"5",
"4",
"4",
"3",
"3",
"7",
"9",
"8",
"7",
"9",
"2",
"1",
"5",
"9",
"3",
"4",
"5",
"8",
"6",
"7",
"8",
"4",
"4",
"4",
"1",
"8",
"4",
"1",
"3",
"7",
"7",
"1",
"5",
"9",
"5",
"8",
"8",
"8",
"4",
"2",
"3",
"6",
"8",
"0",
"4"
] |
[
"nonn",
"cons",
"easy"
] | 14 | 2 | 1 |
[
"A002163",
"A002194",
"A010527",
"A205769",
"A375067",
"A377750",
"A377751",
"A377752",
"A377787"
] | null |
Paolo Xausa, Nov 06 2024
| 2025-02-05T10:12:45 |
oeisdata/seq/A377/A377750.seq
|
287efcf29a94ad82a0d7ceddb9f82e6a
|
A377751
|
Decimal expansion of the volume of a truncated icosahedron with unit edge length.
|
[
"5",
"5",
"2",
"8",
"7",
"7",
"3",
"0",
"7",
"5",
"8",
"1",
"2",
"2",
"7",
"3",
"9",
"2",
"3",
"6",
"3",
"9",
"8",
"6",
"1",
"6",
"9",
"3",
"8",
"8",
"6",
"1",
"2",
"1",
"9",
"5",
"3",
"0",
"9",
"8",
"6",
"6",
"4",
"7",
"3",
"6",
"5",
"8",
"2",
"3",
"9",
"0",
"1",
"5",
"3",
"5",
"9",
"1",
"2",
"1",
"4",
"5",
"3",
"8",
"8",
"1",
"6",
"3",
"0",
"9",
"9",
"9",
"5",
"0",
"6",
"0",
"6",
"4",
"0",
"2",
"6",
"6",
"8",
"7",
"0",
"4",
"9",
"5",
"4",
"8"
] |
[
"nonn",
"cons",
"easy"
] | 9 | 2 | 1 |
[
"A002163",
"A102208",
"A205769",
"A377750",
"A377751",
"A377752",
"A377787"
] | null |
Paolo Xausa, Nov 07 2024
| 2025-02-05T10:25:11 |
oeisdata/seq/A377/A377751.seq
|
50df0977fca6cc0f79a7ecdaeb673357
|
A377752
|
Decimal expansion of the circumradius of a truncated icosahedron with unit edge length.
|
[
"2",
"4",
"7",
"8",
"0",
"1",
"8",
"6",
"5",
"9",
"0",
"6",
"7",
"6",
"1",
"5",
"5",
"3",
"7",
"5",
"6",
"6",
"4",
"0",
"7",
"9",
"1",
"2",
"2",
"6",
"6",
"3",
"0",
"7",
"8",
"0",
"6",
"9",
"3",
"6",
"4",
"9",
"4",
"7",
"3",
"2",
"9",
"7",
"5",
"7",
"9",
"4",
"3",
"8",
"5",
"5",
"4",
"2",
"9",
"5",
"8",
"3",
"8",
"8",
"5",
"3",
"1",
"5",
"9",
"5",
"7",
"7",
"1",
"2",
"0",
"7",
"4",
"2",
"1",
"6",
"7",
"6",
"1",
"8",
"4",
"2",
"6",
"2",
"2",
"0"
] |
[
"nonn",
"cons",
"easy"
] | 8 | 1 | 1 |
[
"A002163",
"A019881",
"A205769",
"A377750",
"A377751",
"A377752",
"A377787"
] | null |
Paolo Xausa, Nov 07 2024
| 2025-02-05T10:23:52 |
oeisdata/seq/A377/A377752.seq
|
481df1af5077c10a3f56bb001e73b240
|
A377753
|
Decimal expansion of 8*G/Pi^2, where G is the Catalan's constant (A006752).
|
[
"7",
"4",
"2",
"4",
"5",
"3",
"7",
"4",
"5",
"4",
"2",
"1",
"5",
"4",
"4",
"3",
"2",
"5",
"9",
"0",
"7",
"9",
"2",
"7",
"9",
"6",
"0",
"7",
"9",
"8",
"8",
"7",
"9",
"9",
"4",
"2",
"4",
"3",
"7",
"7",
"2",
"1",
"8",
"3",
"6",
"5",
"2",
"5",
"1",
"7",
"2",
"8",
"2",
"1",
"6",
"3",
"0",
"4",
"0",
"7",
"6",
"7",
"7",
"5",
"6",
"4",
"5",
"0",
"4",
"4",
"8",
"5",
"1",
"5",
"0",
"3",
"1",
"1",
"0",
"0",
"7",
"1",
"6",
"6",
"9",
"1",
"0",
"8",
"5",
"1",
"0",
"1",
"8",
"4",
"9",
"4",
"5",
"4",
"3",
"9"
] |
[
"nonn",
"cons"
] | 29 | 0 | 1 |
[
"A002388",
"A006752",
"A218387",
"A242822",
"A377753"
] | null |
Stefano Spezia, Nov 07 2024
| 2025-02-12T21:41:12 |
oeisdata/seq/A377/A377753.seq
|
3fdec343d013eec4712e1574fd2e764f
|
A377754
|
Number of edge cuts in the 2n-crossed prism graph.
|
[
"31",
"3013",
"230903",
"15918887",
"1050866239",
"68122980063",
"4382747597055",
"281087648633983",
"18004694320957055",
"1152680455397907455",
"73781031645430967935",
"4722220772206726899711",
"302227902088261487862399",
"19342726881749033661693439",
"1237937954680462294908637823",
"79228112298664648061924646911"
] |
[
"nonn",
"easy"
] | 11 | 1 | 1 |
[
"A297028",
"A377754"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-12-19T21:17:00 |
oeisdata/seq/A377/A377754.seq
|
812c35f8a3c7ce95fe2641ea0cc4944c
|
A377755
|
Number of edge cuts in the n-diagonal intersection graph.
|
[
"4",
"122",
"589556"
] |
[
"nonn",
"bref",
"more"
] | 4 | 3 | 1 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-06T08:36:33 |
oeisdata/seq/A377/A377755.seq
|
6221b6e90dad021172218966c00bd14f
|
A377756
|
Number of free hexagonal polyominoes with n cells with at most 3 collinear cell centers on any line in the plane.
|
[
"1",
"1",
"3",
"6",
"18",
"55",
"169",
"477",
"1245",
"2750",
"5380",
"8989",
"12674",
"14741",
"13928",
"10297",
"6185",
"2910",
"1012",
"289",
"69",
"12",
"2"
] |
[
"nonn",
"fini",
"full"
] | 29 | 1 | 3 |
[
"A000228",
"A377756",
"A378015"
] | null |
Dave Budd, Nov 06 2024
| 2024-12-03T12:41:14 |
oeisdata/seq/A377/A377756.seq
|
3ac15eb2517409e3ba4a0bb61b1d285b
|
A377757
|
Number of possibilities to place "hat" monotiles onto the first n hexagons in a counterclockwise order such that more rings of tiles can be placed around it.
|
[
"1",
"3",
"7",
"9",
"10",
"15",
"18",
"22",
"23",
"26",
"26",
"30",
"32",
"35",
"37",
"43",
"44",
"44",
"44",
"51",
"51",
"56",
"60",
"60",
"65",
"69",
"74",
"80",
"86",
"86",
"86",
"94",
"94",
"94",
"100",
"105",
"109"
] |
[
"nonn",
"more"
] | 30 | 1 | 2 |
[
"A342285",
"A363348",
"A363445",
"A377757"
] | null |
Ruediger Jehn and Kester Habermann, Nov 06 2024
| 2025-06-13T22:43:05 |
oeisdata/seq/A377/A377757.seq
|
0bf4ba0b6b1f776dd744bed4619e7c35
|
A377758
|
a(n) is the least i such that 2n-prime(i) is also a prime, where prime(i) is the i-th prime.
|
[
"1",
"2",
"2",
"2",
"3",
"2",
"2",
"3",
"2",
"2",
"3",
"2",
"3",
"4",
"2",
"2",
"3",
"4",
"2",
"3",
"2",
"2",
"3",
"2",
"3",
"4",
"2",
"3",
"4",
"2",
"2",
"3",
"4",
"2",
"3",
"2",
"2",
"3",
"4",
"2",
"3",
"2",
"3",
"4",
"2",
"3",
"4",
"8",
"2",
"3",
"2",
"2",
"3",
"2",
"2",
"3",
"2",
"3",
"4",
"6",
"5",
"6",
"8",
"2",
"3",
"2",
"3",
"4",
"2",
"2",
"3",
"4",
"5",
"5",
"2",
"2",
"3",
"4",
"2",
"3",
"4",
"2",
"3",
"2",
"3"
] |
[
"nonn"
] | 24 | 2 | 2 |
[
"A000040",
"A000720",
"A020481",
"A377758",
"A377972"
] | null |
Michel Eduardo Beleza Yamagishi, Nov 06 2024
| 2024-11-20T07:18:24 |
oeisdata/seq/A377/A377758.seq
|
49347b2d4e8d8673d7942c271ebc98a8
|
A377759
|
Number of edge cuts in the n-double cone graph.
|
[
"1",
"12",
"156",
"2652",
"47580",
"835132",
"14274492",
"239210620",
"3954121852",
"64745687292",
"1053187674876",
"17052187400700",
"275180267037180",
"4430223031522300",
"71202253472533500",
"1142950923338418172",
"18330518457789188092",
"293793080103272648700",
"4706573484385846964220"
] |
[
"nonn"
] | 18 | 0 | 2 |
[
"A158525",
"A377759"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2025-01-02T09:34:22 |
oeisdata/seq/A377/A377759.seq
|
c30b04680ded40cd41db33907cacba65
|
A377760
|
Number of edge cuts in the n-Fibonacci cube graph.
|
[
"1",
"3",
"27",
"919",
"966481",
"256418362791",
"2223475667632781470751"
] |
[
"nonn",
"more"
] | 8 | 1 | 2 |
[
"A297051",
"A352247",
"A377653",
"A377760"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-12-09T19:45:44 |
oeisdata/seq/A377/A377760.seq
|
333061d6c8106d31af1cea284fb546c8
|
A377761
|
Number of edge cuts in the halved cube graph Q_n/2.
|
[
"0",
"1",
"26",
"2107526"
] |
[
"nonn",
"more"
] | 4 | 1 | 3 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-06T14:23:35 |
oeisdata/seq/A377/A377761.seq
|
cc0637465bffbc9fba26659529e1ae0f
|
A377762
|
Number of edge cuts in the hypercube graph Q_n.
|
[
"0",
"1",
"11",
"3013",
"3055641151"
] |
[
"nonn",
"more"
] | 14 | 0 | 3 |
[
"A061301",
"A372705",
"A377762"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-07T10:54:56 |
oeisdata/seq/A377/A377762.seq
|
6dc9d2c4cedf6d6b721f16c3b25df4d9
|
A377763
|
Triangular array read by rows. T(n,k) is the number of partial functions f on [n] such that there are exactly k points in [n] that are neither in the domain of f nor in the image of f, n>=0, 0<=k<=n.
|
[
"1",
"1",
"1",
"6",
"2",
"1",
"42",
"18",
"3",
"1",
"416",
"168",
"36",
"4",
"1",
"5210",
"2080",
"420",
"60",
"5",
"1",
"79212",
"31260",
"6240",
"840",
"90",
"6",
"1",
"1417094",
"554484",
"109410",
"14560",
"1470",
"126",
"7",
"1",
"29168624",
"11336752",
"2217936",
"291760",
"29120",
"2352",
"168",
"8",
"1",
"679100562",
"262517616",
"51015384",
"6653808",
"656460",
"52416",
"3528",
"216",
"9",
"1"
] |
[
"nonn",
"tabl"
] | 9 | 0 | 4 |
[
"A000169",
"A377535",
"A377763"
] | null |
Geoffrey Critzer, Nov 06 2024
| 2024-11-07T09:51:51 |
oeisdata/seq/A377/A377763.seq
|
229c49aeea8f2107f4ebef6c36e18039
|
A377764
|
Decimal expansion of (Pi/8)*exp(4*G/Pi), where G is the Catalan constant (A006752).
|
[
"1",
"2",
"6",
"0",
"5",
"2",
"9",
"6",
"1",
"2",
"8",
"2",
"9",
"3",
"8",
"6",
"4",
"1",
"0",
"5",
"5",
"4",
"5",
"3",
"6",
"3",
"3",
"0",
"1",
"3",
"5",
"4",
"0",
"9",
"8",
"4",
"2",
"2",
"0",
"2",
"6",
"6",
"9",
"2",
"3",
"9",
"3",
"5",
"1",
"5",
"8",
"8",
"7",
"2",
"2",
"6",
"1",
"0",
"7",
"7",
"6",
"8",
"3",
"3",
"7",
"3",
"4",
"3",
"3",
"9",
"2",
"6",
"0",
"5",
"9",
"0",
"0",
"9",
"3",
"5",
"1",
"1",
"8",
"8",
"6",
"7",
"0",
"5",
"0",
"7"
] |
[
"nonn",
"cons",
"easy"
] | 16 | 1 | 2 |
[
"A000796",
"A001113",
"A005408",
"A006752",
"A016754",
"A019675",
"A229728",
"A377764"
] | null |
Paolo Xausa, Nov 06 2024
| 2024-11-07T09:52:18 |
oeisdata/seq/A377/A377764.seq
|
a4eaf38b6728c739f45af32298469155
|
A377765
|
Number of edge cuts in the n-Mycielski graph.
|
[
"0",
"1",
"26",
"733840"
] |
[
"nonn",
"more"
] | 4 | 1 | 3 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-06T19:33:19 |
oeisdata/seq/A377/A377765.seq
|
91db2a6eca0883c8906cf34c1890c08e
|
A377766
|
Even numbers whose sum of proper (or aliquot) divisors is a prime.
|
[
"4",
"8",
"32",
"50",
"98",
"128",
"242",
"324",
"338",
"392",
"722",
"784",
"800",
"1058",
"1250",
"1444",
"2304",
"2312",
"2450",
"2704",
"2738",
"3600",
"3872",
"5408",
"5476",
"5618",
"6272",
"6728",
"7442",
"7688",
"8192",
"9248",
"11552",
"12482",
"12800",
"14400",
"14884",
"15488",
"15842",
"16562",
"16900",
"16928",
"17672",
"18050",
"19208",
"21632",
"21904",
"22500",
"23762",
"25088"
] |
[
"nonn",
"easy"
] | 19 | 1 | 1 |
[
"A005843",
"A037020",
"A088827",
"A377766"
] | null |
Ophir Spector, Nov 06 2024
| 2025-06-23T14:31:44 |
oeisdata/seq/A377/A377766.seq
|
a4e04fc77c4bd97b09052cb9a0095bb9
|
A377767
|
Number of edge cuts in the path complement graph bar-P_n.
|
[
"0",
"0",
"1",
"7",
"46",
"546",
"11628",
"453478"
] |
[
"nonn",
"more"
] | 4 | 1 | 4 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-06T19:33:24 |
oeisdata/seq/A377/A377767.seq
|
8efb6e91ee47735fccf9841bfcc4fa04
|
A377768
|
Number of edge cuts in the n-Pell graph.
|
[
"1",
"27",
"241917"
] |
[
"nonn",
"bref",
"more"
] | 4 | 1 | 2 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-06T19:33:28 |
oeisdata/seq/A377/A377768.seq
|
59fafe970164f360a00cc4e5fa938a65
|
A377769
|
Number of edge cuts in the n-Plummer-Toft graph.
|
[
"314",
"2430",
"19538",
"159806",
"1316946",
"10879134",
"89853810",
"741053950",
"6099643154",
"50099413854",
"410626550450",
"3358899990206",
"27425013503058",
"223544362076190",
"1819336077737970",
"14786154478432126",
"120017920267627922",
"973050998951150814",
"7880772707278994738"
] |
[
"nonn",
"easy"
] | 17 | 1 | 1 |
[
"A377769",
"A378848"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-12-10T03:14:05 |
oeisdata/seq/A377/A377769.seq
|
35d7480e75f6cecc332dff314ec08748
|
A377770
|
Number of edge cuts in the n-sun graph.
|
[
"352",
"12288",
"835136",
"112401536",
"30002742528",
"15880652217344",
"16683074712270848",
"34833976925854744576",
"144763849350825640771584",
"1198828803162890720261832704",
"19801234970824269599291963473920",
"652780936334766267635417175938039808"
] |
[
"nonn",
"more"
] | 13 | 3 | 1 |
[
"A290933",
"A377770",
"A378796"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-12-13T09:32:11 |
oeisdata/seq/A377/A377770.seq
|
ca415b14380ba1d892b3e145a7691eb5
|
A377771
|
Number of edge cuts in the n-trapezohedral graph.
|
[
"1",
"13",
"185",
"3013",
"51009",
"864453",
"14514449",
"241137749",
"3969473217",
"64867543333",
"1054153461745",
"17059836799733",
"275240835803937",
"4430702562116805",
"71206049773837905",
"1142980976834497173",
"18330756374528899457",
"293794963549100393573",
"4706588394482611291313",
"75373885078381735479861"
] |
[
"nonn",
"easy"
] | 9 | 0 | 2 |
[
"A356213",
"A377771"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2024-12-19T21:17:05 |
oeisdata/seq/A377/A377771.seq
|
259d068b157574a7eb9e7970fe68bb26
|
A377772
|
Number of edge cuts in the n-triangular grid graph.
|
[
"0",
"4",
"352",
"205952",
"909622784",
"31295082653696",
"8484952062010458112",
"18227547762157700745396224",
"311174877767551886508446611406848",
"42294654497199437221532169279178468753408",
"45827231806117374257502404342058904364252227698688",
"396204754408958726445756226789038664515203519656360012677120"
] |
[
"nonn"
] | 10 | 0 | 2 | null | null |
Eric W. Weisstein, Nov 06 2024
| 2024-11-27T08:07:33 |
oeisdata/seq/A377/A377772.seq
|
08f4f6cbb6d17381f3901e867d70ff99
|
A377773
|
Number of edge cuts in the n-web graph.
|
[
"1",
"12",
"223",
"3898",
"64453",
"1042868",
"16747743",
"268285422",
"4294211881",
"68715706984",
"1099492954547",
"17592094126818",
"281474526684989",
"4503597434338652",
"72057583394694855",
"1152921453139596758",
"18446743825630274641",
"295147903987017778256",
"4722366477153821698011"
] |
[
"nonn"
] | 20 | 0 | 2 |
[
"A359621",
"A377773"
] | null |
Eric W. Weisstein, Nov 06 2024
| 2025-01-02T12:15:45 |
oeisdata/seq/A377/A377773.seq
|
8d0b9fa614b51cea3257fcfe6f2c2a9f
|
A377774
|
a(n) = largest prime p < gpf(n) that does not divide n, or p = nextprime(gpf(n)) for n in A055932, where gpf = A006530.
|
[
"2",
"3",
"2",
"3",
"3",
"5",
"5",
"3",
"2",
"3",
"7",
"5",
"11",
"5",
"2",
"3",
"13",
"5",
"17",
"3",
"5",
"7",
"19",
"5",
"3",
"11",
"2",
"5",
"23",
"7",
"29",
"3",
"7",
"13",
"3",
"5",
"31",
"17",
"11",
"3",
"37",
"5",
"41",
"7",
"2",
"19",
"43",
"5",
"5",
"3",
"13",
"11",
"47",
"5",
"7",
"5",
"17",
"23",
"53",
"7",
"59",
"29",
"5",
"3",
"11",
"7",
"61",
"13",
"19",
"3",
"67",
"5",
"71",
"31",
"2",
"17",
"5"
] |
[
"nonn",
"easy"
] | 14 | 1 | 1 |
[
"A002110",
"A006530",
"A007947",
"A053669",
"A055932",
"A079068",
"A377774"
] | null |
Michael De Vlieger, Nov 22 2024
| 2024-11-24T09:38:36 |
oeisdata/seq/A377/A377774.seq
|
63b6b012606b0757cd2ab3bdcfb911bc
|
A377775
|
Least lucky multiple of 2*n+1, or 0 if no such multiple exists.
|
[
"1",
"3",
"15",
"7",
"9",
"33",
"13",
"15",
"51",
"133",
"21",
"69",
"25",
"135",
"87",
"31",
"33",
"105",
"37",
"195",
"205",
"43",
"135",
"141",
"49",
"51",
"159",
"385",
"171",
"885",
"427",
"63",
"195",
"67",
"69",
"639",
"73",
"75",
"231",
"79",
"729",
"415",
"1105",
"87",
"267",
"273",
"93",
"285",
"679",
"99",
"303",
"927",
"105",
"321",
"327",
"111",
"339",
"115"
] |
[
"nonn"
] | 7 | 0 | 2 |
[
"A000959",
"A377775",
"A377776",
"A377777"
] | null |
Pontus von Brömssen, Nov 07 2024
| 2024-11-13T17:25:05 |
oeisdata/seq/A377/A377775.seq
|
c0c11cdb0cf55998f1fea1e07649bfff
|
A377776
|
a(n) = A377775(n)/(2*n+1).
|
[
"1",
"1",
"3",
"1",
"1",
"3",
"1",
"1",
"3",
"7",
"1",
"3",
"1",
"5",
"3",
"1",
"1",
"3",
"1",
"5",
"5",
"1",
"3",
"3",
"1",
"1",
"3",
"7",
"3",
"15",
"7",
"1",
"3",
"1",
"1",
"9",
"1",
"1",
"3",
"1",
"9",
"5",
"13",
"1",
"3",
"3",
"1",
"3",
"7",
"1",
"3",
"9",
"1",
"3",
"3",
"1",
"3",
"1",
"7",
"3",
"67",
"5",
"17",
"1",
"1",
"3",
"1",
"1",
"5",
"9",
"1",
"3",
"19",
"5",
"5",
"1",
"21",
"9",
"15",
"1",
"3",
"1",
"3",
"9",
"1"
] |
[
"nonn"
] | 5 | 0 | 3 |
[
"A000959",
"A377775",
"A377776",
"A377778"
] | null |
Pontus von Brömssen, Nov 07 2024
| 2024-11-13T17:25:14 |
oeisdata/seq/A377/A377776.seq
|
094671f7039126cc1dc5475cb406fe76
|
A377777
|
Least ludic multiple of n, or 0 if no such multiple exists.
|
[
"1",
"2",
"3",
"0",
"5",
"0",
"7",
"0",
"0",
"0",
"11",
"0",
"13",
"0",
"0",
"0",
"17",
"0",
"209",
"0",
"0",
"0",
"23",
"0",
"25",
"0",
"0",
"0",
"29",
"0",
"341",
"0",
"0",
"0",
"175",
"0",
"37",
"0",
"0",
"0",
"41",
"0",
"43",
"0",
"0",
"0",
"47",
"0",
"931",
"0",
"0",
"0",
"53",
"0",
"1045",
"0",
"0",
"0",
"1829",
"0",
"61",
"0",
"0",
"0",
"1105",
"0",
"67",
"0",
"0",
"0",
"71",
"0",
"803",
"0",
"0",
"0"
] |
[
"nonn"
] | 5 | 1 | 2 |
[
"A003309",
"A377775",
"A377777",
"A377778"
] | null |
Pontus von Brömssen, Nov 07 2024
| 2024-11-13T17:25:22 |
oeisdata/seq/A377/A377777.seq
|
61420e12956787da70dec32dbb43c546
|
A377778
|
a(n) = A377777(n)/n.
|
[
"1",
"1",
"1",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"11",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"11",
"0",
"0",
"0",
"5",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"19",
"0",
"0",
"0",
"1",
"0",
"19",
"0",
"0",
"0",
"31",
"0",
"1",
"0",
"0",
"0",
"17",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"11",
"0",
"0",
"0",
"1",
"0",
"7",
"0",
"0",
"0",
"1",
"0",
"7"
] |
[
"nonn"
] | 5 | 1 | 19 |
[
"A003309",
"A377776",
"A377777",
"A377778"
] | null |
Pontus von Brömssen, Nov 07 2024
| 2024-11-13T17:25:30 |
oeisdata/seq/A377/A377778.seq
|
664c4d1065aa73e3c89231ce1263a3c2
|
A377779
|
Numbers k such that (31^k - 2^k)/29 is prime.
|
[
"5",
"17",
"541",
"701",
"769"
] |
[
"nonn",
"hard",
"more"
] | 6 | 1 | 1 |
[
"A062587",
"A062589",
"A127996",
"A127997",
"A128344",
"A204940",
"A217320",
"A225807",
"A229542",
"A375161",
"A375236",
"A377031",
"A377779"
] | null |
Robert Price, Nov 06 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377779.seq
|
b174ceb344b33d9900644497c5dbc100
|
A377780
|
First differences of A000015 (smallest prime-power >= n).
|
[
"0",
"1",
"1",
"1",
"2",
"0",
"1",
"1",
"2",
"0",
"2",
"0",
"3",
"0",
"0",
"1",
"2",
"0",
"4",
"0",
"0",
"0",
"2",
"0",
"2",
"0",
"2",
"0",
"2",
"0",
"1",
"5",
"0",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"2",
"0",
"4",
"0",
"0",
"0",
"2",
"0",
"4",
"0",
"0",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"3",
"0",
"0",
"3",
"0",
"0",
"4",
"0",
"0",
"0",
"2",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"2",
"0",
"6",
"0",
"0",
"0",
"0"
] |
[
"nonn"
] | 8 | 1 | 5 |
[
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007949",
"A024619",
"A031218",
"A053289",
"A053607",
"A057820",
"A065514",
"A067535",
"A080101",
"A112925",
"A112926",
"A120327",
"A246655",
"A343249",
"A343250",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A376599",
"A377282",
"A377289",
"A377468",
"A377780",
"A377781",
"A377782"
] | null |
Gus Wiseman, Nov 13 2024
| 2024-11-16T22:15:45 |
oeisdata/seq/A377/A377780.seq
|
eb42019fa1421bf33dff3aef8364fb6c
|
A377781
|
First differences of A065514(n) = greatest number < prime(n) that is 1 or a prime-power.
|
[
"1",
"2",
"1",
"4",
"2",
"5",
"1",
"2",
"8",
"2",
"3",
"5",
"4",
"2",
"6",
"4",
"6",
"5",
"3",
"4",
"2",
"8",
"2",
"6",
"8",
"4",
"2",
"4",
"2",
"16",
"3",
"3",
"6",
"2",
"10",
"2",
"6",
"6",
"6",
"4",
"6",
"2",
"10",
"2",
"4",
"2",
"12",
"12",
"4",
"2",
"4",
"6",
"4",
"13",
"1",
"6",
"6",
"2",
"6",
"4",
"8",
"4",
"14",
"4",
"2",
"4",
"14",
"12",
"4",
"2",
"4",
"8",
"6",
"6",
"6",
"4",
"6",
"8",
"4",
"8",
"10",
"2",
"10"
] |
[
"nonn"
] | 12 | 1 | 2 |
[
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A008864",
"A024619",
"A031218",
"A053289",
"A053607",
"A057820",
"A065514",
"A067535",
"A070321",
"A080101",
"A112925",
"A112926",
"A120327",
"A246655",
"A304521",
"A343249",
"A345531",
"A361102",
"A366833",
"A375706",
"A375708",
"A375735",
"A376599",
"A377057",
"A377281",
"A377282",
"A377286",
"A377287",
"A377288",
"A377289",
"A377703",
"A377781",
"A377782",
"A377783",
"A377784",
"A378032",
"A378033",
"A378034",
"A378037",
"A378038"
] | null |
Gus Wiseman, Nov 14 2024
| 2024-11-16T22:15:52 |
oeisdata/seq/A377/A377781.seq
|
bf40f78e22d15e3bdf035fe6e0798e2a
|
A377782
|
First-differences of A031218(n) = greatest number <= n that is 1 or a prime-power.
|
[
"1",
"1",
"1",
"1",
"0",
"2",
"1",
"1",
"0",
"2",
"0",
"2",
"0",
"0",
"3",
"1",
"0",
"2",
"0",
"0",
"0",
"4",
"0",
"2",
"0",
"2",
"0",
"2",
"0",
"2",
"1",
"0",
"0",
"0",
"0",
"5",
"0",
"0",
"0",
"4",
"0",
"2",
"0",
"0",
"0",
"4",
"0",
"2",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"2",
"0",
"0",
"3",
"0",
"0",
"3",
"0",
"0",
"0",
"4",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"2",
"0",
"2",
"0",
"0",
"0",
"0",
"0"
] |
[
"nonn"
] | 14 | 1 | 6 |
[
"A000015",
"A000040",
"A000961",
"A001223",
"A006549",
"A024619",
"A031218",
"A053289",
"A053607",
"A057820",
"A065514",
"A070321",
"A080101",
"A080765",
"A112925",
"A120327",
"A120432",
"A167236",
"A181062",
"A246655",
"A343249",
"A345531",
"A361102",
"A366833",
"A373677",
"A375706",
"A375708",
"A375735",
"A376599",
"A377057",
"A377281",
"A377282",
"A377286",
"A377287",
"A377289",
"A377703",
"A377780",
"A377781",
"A377782",
"A378032",
"A378033",
"A378034",
"A378036",
"A378038",
"A378039",
"A378085"
] | null |
Gus Wiseman, Nov 16 2024
| 2024-11-17T20:35:32 |
oeisdata/seq/A377/A377782.seq
|
9a6fa181bced77cadfc875c5fe833e61
|
A377783
|
Least nonsquarefree number > prime(n).
|
[
"4",
"4",
"8",
"8",
"12",
"16",
"18",
"20",
"24",
"32",
"32",
"40",
"44",
"44",
"48",
"54",
"60",
"63",
"68",
"72",
"75",
"80",
"84",
"90",
"98",
"104",
"104",
"108",
"112",
"116",
"128",
"132",
"140",
"140",
"150",
"152",
"160",
"164",
"168",
"175",
"180",
"184",
"192",
"196",
"198",
"200",
"212",
"224",
"228",
"232",
"234",
"240",
"242",
"252",
"260",
"264",
"270",
"272"
] |
[
"nonn"
] | 8 | 1 | 1 |
[
"A000015",
"A000040",
"A001223",
"A005117",
"A013597",
"A013928",
"A013929",
"A014210",
"A036263",
"A053797",
"A053806",
"A061398",
"A061399",
"A065514",
"A068360",
"A068361",
"A070321",
"A072284",
"A078147",
"A112925",
"A112926",
"A120327",
"A120992",
"A224363",
"A337030",
"A345531",
"A376593",
"A377047",
"A377048",
"A377049",
"A377430",
"A377431",
"A377783",
"A377784",
"A378032",
"A378033",
"A378034",
"A378036",
"A378037",
"A378038",
"A378039",
"A378040",
"A378082",
"A378083",
"A378084"
] | null |
Gus Wiseman, Nov 16 2024
| 2024-11-17T20:35:47 |
oeisdata/seq/A377/A377783.seq
|
0c511e81b14e397ed4c40ea3683dc88e
|
A377784
|
First-differences of A377783 (least nonsquarefree number > prime(n)).
|
[
"0",
"4",
"0",
"4",
"4",
"2",
"2",
"4",
"8",
"0",
"8",
"4",
"0",
"4",
"6",
"6",
"3",
"5",
"4",
"3",
"5",
"4",
"6",
"8",
"6",
"0",
"4",
"4",
"4",
"12",
"4",
"8",
"0",
"10",
"2",
"8",
"4",
"4",
"7",
"5",
"4",
"8",
"4",
"2",
"2",
"12",
"12",
"4",
"4",
"2",
"6",
"2",
"10",
"8",
"4",
"6",
"2",
"7",
"5",
"0",
"10",
"14",
"4",
"3",
"5",
"12",
"6",
"10",
"2",
"6",
"4",
"8",
"7",
"5",
"4",
"8",
"8",
"4",
"8",
"8",
"3",
"9",
"4",
"4"
] |
[
"nonn"
] | 8 | 1 | 2 |
[
"A000015",
"A000040",
"A001223",
"A005117",
"A013928",
"A013929",
"A036263",
"A053797",
"A053806",
"A061398",
"A061399",
"A068360",
"A068361",
"A070321",
"A072284",
"A078147",
"A112925",
"A112926",
"A120327",
"A224363",
"A337030",
"A345531",
"A376593",
"A377047",
"A377048",
"A377049",
"A377430",
"A377431",
"A377703",
"A377783",
"A377784",
"A378032",
"A378033",
"A378034",
"A378036",
"A378037",
"A378038",
"A378039",
"A378040",
"A378082",
"A378083",
"A378084",
"A378086"
] | null |
Gus Wiseman, Nov 18 2024
| 2024-11-19T17:32:04 |
oeisdata/seq/A377/A377784.seq
|
6cc31d8e101474bf4540d1f2fcaae926
|
A377785
|
Number of n-node connected unsensed planar maps with an external face in which all internal faces are triangles.
|
[
"1",
"2",
"5",
"19",
"80",
"407",
"2403",
"15570",
"107366",
"773660",
"5746826",
"43693041",
"338367370",
"2660629311",
"21193182914",
"170714892489",
"1388711749891",
"11395477091396",
"94238431709661",
"784796579069288",
"6576997589788217",
"55435506835745851",
"469698698872829672",
"3998806331800289798"
] |
[
"nonn"
] | 24 | 3 | 2 |
[
"A005027",
"A342056",
"A377785",
"A378103",
"A378335",
"A378339",
"A378340"
] | null |
Ya-Ping Lu, Nov 06 2024
| 2024-11-25T16:29:08 |
oeisdata/seq/A377/A377785.seq
|
af77f5bb47941cbba06953ea4bf11fa7
|
A377786
|
Numbers k such that 5^sigma(k) - k is a prime.
|
[
"4",
"524",
"7206",
"11156"
] |
[
"nonn",
"more"
] | 43 | 1 | 1 |
[
"A000043",
"A000203",
"A000668",
"A023194",
"A023195",
"A253850",
"A253851",
"A367460",
"A368651",
"A377786",
"A377927"
] | null |
J.W.L. (Jan) Eerland, Nov 11 2024
| 2024-11-14T08:23:35 |
oeisdata/seq/A377/A377786.seq
|
425d472eb8128aaaecc50baf0489b552
|
A377787
|
Decimal expansion of 30*arctan(2).
|
[
"3",
"3",
"2",
"1",
"4",
"4",
"6",
"1",
"5",
"3",
"3",
"8",
"2",
"2",
"7",
"1",
"5",
"0",
"9",
"0",
"5",
"1",
"1",
"9",
"6",
"3",
"8",
"0",
"5",
"3",
"5",
"6",
"1",
"1",
"1",
"2",
"0",
"2",
"1",
"0",
"1",
"4",
"2",
"9",
"3",
"6",
"2",
"0",
"4",
"2",
"9",
"7",
"9",
"4",
"0",
"0",
"2",
"9",
"6",
"1",
"7",
"6",
"2",
"2",
"3",
"0",
"1",
"1",
"3",
"1",
"0",
"1",
"6",
"9",
"3",
"2",
"0",
"8",
"8",
"3",
"8",
"2",
"0",
"4",
"0",
"2",
"5",
"1",
"3",
"8",
"6",
"0",
"5",
"8",
"5",
"1",
"1",
"9",
"2",
"4"
] |
[
"nonn",
"cons"
] | 8 | 2 | 1 | null | null |
Eric W. Weisstein, Nov 07 2024
| 2024-11-20T23:46:48 |
oeisdata/seq/A377/A377787.seq
|
f24e475d61f795b93a8681b9a3aa5ccb
|
A377788
|
a(n) is the smallest prime not yet in the sequence such that pi(a(n)) divides the sum a(n) + n, or -1 if no such prime exists.
|
[
"2",
"31",
"3",
"5",
"7",
"3067",
"89",
"307",
"11",
"3049",
"13",
"313",
"19",
"23539",
"3023",
"269",
"223",
"17",
"251",
"23497",
"29",
"23",
"37",
"41",
"911",
"59",
"43",
"47",
"61",
"1303051",
"79",
"73",
"107",
"2647",
"811",
"109",
"113",
"2671",
"2663",
"2683",
"787",
"1303091",
"53",
"2609",
"8059",
"2621",
"67",
"2591",
"71",
"23431",
"2693",
"2699"
] |
[
"sign"
] | 25 | 1 | 1 |
[
"A000040",
"A000720",
"A377788"
] | null |
Tamas Sandor Nagy, Nov 07 2024
| 2024-11-16T15:02:52 |
oeisdata/seq/A377/A377788.seq
|
b5acf623f8fd9691d448961a7b49b4ef
|
A377789
|
Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 - 2*log(1-x)) ).
|
[
"1",
"2",
"10",
"88",
"1148",
"20088",
"442896",
"11802096",
"369132256",
"13261156416",
"538227938880",
"24359100451200",
"1216403663398656",
"66440221207025664",
"3940468338389603328",
"252190997066643909120",
"17324237625466992906240",
"1271459220768570290626560",
"99289436336361780797288448"
] |
[
"nonn"
] | 9 | 0 | 2 |
[
"A138013",
"A370941",
"A371005",
"A377789",
"A377790"
] | null |
Seiichi Manyama, Nov 07 2024
| 2024-11-07T10:54:42 |
oeisdata/seq/A377/A377789.seq
|
795bbbed6bbd47a9a79cf191bd814972
|
A377790
|
Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 - 3*log(1-x)) ).
|
[
"1",
"3",
"21",
"249",
"4302",
"98982",
"2860686",
"99779418",
"4081683744",
"191696903424",
"10168315038360",
"601321398385320",
"39230551252853424",
"2799199551778309872",
"216856533870111053520",
"18127987493141612555280",
"1626479163148212406506240",
"155902932291162161594016000"
] |
[
"nonn"
] | 12 | 0 | 2 |
[
"A138013",
"A371006",
"A377789",
"A377790"
] | null |
Seiichi Manyama, Nov 07 2024
| 2024-11-07T10:54:36 |
oeisdata/seq/A377/A377790.seq
|
34b825c78680ba3b71b150d2a3998e83
|
A377791
|
Primes in A194627.
|
[
"2",
"3",
"41",
"59",
"593",
"4787",
"4937",
"8699",
"9281",
"9491",
"44201",
"45491",
"49429",
"59219",
"90197",
"93251",
"93893",
"115211",
"118661",
"136523",
"152501",
"156467",
"166949",
"184571",
"185477",
"189851",
"225353",
"232091",
"236981",
"239963",
"277577",
"364571",
"375569",
"386731",
"428873",
"577307",
"581941",
"662339",
"717161",
"718931",
"758501",
"763811"
] |
[
"nonn"
] | 19 | 1 | 1 |
[
"A194627",
"A377791",
"A377882"
] | null |
Robert Israel, Nov 10 2024
| 2024-11-11T09:01:19 |
oeisdata/seq/A377/A377791.seq
|
a2a055dbaf81d7907cbaccda4cc41c82
|
A377792
|
Irregular triangle where row n lists squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.
|
[
"6",
"15",
"21",
"35",
"55",
"65",
"85",
"95",
"115",
"385",
"455",
"595",
"77",
"91",
"119",
"133",
"161",
"203",
"217",
"259",
"287",
"301",
"329",
"1001",
"1309",
"1463",
"1547",
"1729",
"1771",
"2093",
"2233",
"2261",
"2387",
"143",
"187",
"209",
"253",
"319",
"341",
"407",
"451",
"473",
"517",
"583",
"649",
"671",
"737",
"781",
"803",
"869",
"913",
"979",
"1067"
] |
[
"nonn",
"tabf",
"easy"
] | 9 | 1 | 1 |
[
"A001222",
"A020639",
"A120944",
"A377713",
"A377792",
"A377793"
] | null |
Michael De Vlieger, Nov 07 2024
| 2024-11-13T17:17:38 |
oeisdata/seq/A377/A377792.seq
|
93823573a82f5c3f21d2f99803992764
|
A377793
|
a(n) is the number of squarefree composite k with lpf(k) = prime(n) such that m <= Omega(k), where lpf = A020639, m = floor(log k / log lpf(k)), and Omega = A001222.
|
[
"1",
"2",
"9",
"21",
"128",
"194",
"713",
"874",
"2276",
"11898",
"12522",
"52469",
"103824",
"99930",
"173685",
"534743",
"1608864",
"1438340",
"3894769",
"5881191",
"5008669",
"11802600",
"16274460",
"36220208",
"132526590",
"178177142"
] |
[
"nonn",
"hard",
"more"
] | 7 | 1 | 2 |
[
"A001222",
"A020639",
"A120944",
"A377713",
"A377792",
"A377793"
] | null |
Michael De Vlieger, Nov 07 2024
| 2025-06-02T15:28:29 |
oeisdata/seq/A377/A377793.seq
|
ed92a0ca74b2837994b51106909b189e
|
A377794
|
a(n) is the greatest number of prime factors with multiplicity of squarefree composite k such that k has lpf(k) = prime(n) such that m <= a(n), where lpf = A020639, m = floor(log k / log lpf(k)).
|
[
"2",
"2",
"3",
"3",
"5",
"5",
"6",
"6",
"7",
"8",
"8",
"9",
"10",
"10",
"10",
"11",
"12",
"12",
"13",
"13",
"12",
"13",
"13",
"14",
"15",
"15",
"15",
"15",
"14",
"14",
"17",
"17",
"18",
"17",
"19",
"18",
"19",
"19",
"19",
"20",
"20",
"20",
"21",
"21",
"20",
"20",
"22",
"23",
"23",
"23",
"23",
"23",
"22",
"23",
"24",
"24",
"24",
"24",
"24",
"24",
"23",
"24",
"26",
"26",
"26",
"25",
"27",
"28",
"29"
] |
[
"nonn",
"easy"
] | 7 | 1 | 1 |
[
"A001222",
"A020639",
"A120944",
"A377713",
"A377792",
"A377794"
] | null |
Michael De Vlieger, Nov 07 2024
| 2024-11-13T17:17:56 |
oeisdata/seq/A377/A377794.seq
|
21989d2fa6e6a3c4a969f03122ec35e9
|
A377795
|
Decimal expansion of the midradius of a (small) rhombicosidodecahedron with unit edge length.
|
[
"2",
"1",
"7",
"6",
"2",
"5",
"0",
"8",
"9",
"9",
"4",
"8",
"2",
"8",
"2",
"1",
"5",
"1",
"1",
"1",
"0",
"0",
"0",
"5",
"2",
"8",
"6",
"5",
"9",
"9",
"7",
"7",
"6",
"7",
"8",
"8",
"0",
"1",
"9",
"8",
"0",
"7",
"3",
"1",
"9",
"1",
"5",
"8",
"9",
"3",
"2",
"9",
"9",
"4",
"7",
"2",
"3",
"0",
"1",
"0",
"1",
"7",
"4",
"5",
"9",
"2",
"4",
"8",
"3",
"3",
"2",
"0",
"0",
"9",
"7",
"2",
"0",
"7",
"6",
"8",
"0",
"9",
"5",
"0",
"7",
"6",
"7",
"9",
"1",
"8"
] |
[
"nonn",
"cons",
"easy"
] | 8 | 1 | 1 |
[
"A002163",
"A179592",
"A185093",
"A344149",
"A377606",
"A377795"
] | null |
Paolo Xausa, Nov 08 2024
| 2024-11-08T11:38:14 |
oeisdata/seq/A377/A377795.seq
|
702039b8895629165aa563fab61f47df
|
A377796
|
Decimal expansion of the surface area of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length.
|
[
"1",
"7",
"4",
"2",
"9",
"2",
"0",
"3",
"0",
"3",
"4",
"2",
"3",
"2",
"3",
"9",
"2",
"0",
"8",
"8",
"2",
"9",
"3",
"2",
"1",
"0",
"7",
"5",
"2",
"6",
"2",
"8",
"3",
"4",
"6",
"5",
"7",
"2",
"8",
"4",
"8",
"5",
"2",
"2",
"1",
"9",
"2",
"0",
"4",
"4",
"5",
"1",
"9",
"1",
"6",
"5",
"2",
"8",
"4",
"8",
"8",
"9",
"6",
"8",
"9",
"4",
"8",
"0",
"3",
"8",
"8",
"9",
"1",
"6",
"2",
"1",
"1",
"6",
"7",
"2",
"8",
"6",
"6",
"6",
"0",
"7",
"2",
"1",
"9",
"7"
] |
[
"nonn",
"cons",
"easy"
] | 6 | 3 | 2 |
[
"A019970",
"A090388",
"A377796",
"A377797",
"A377798",
"A377799"
] | null |
Paolo Xausa, Nov 07 2024
| 2024-11-08T11:38:18 |
oeisdata/seq/A377/A377796.seq
|
b1452e9fc71c0480490e04540df051fd
|
A377797
|
Decimal expansion of the volume of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length.
|
[
"2",
"0",
"6",
"8",
"0",
"3",
"3",
"9",
"8",
"8",
"7",
"4",
"9",
"8",
"9",
"4",
"8",
"4",
"8",
"2",
"0",
"4",
"5",
"8",
"6",
"8",
"3",
"4",
"3",
"6",
"5",
"6",
"3",
"8",
"1",
"1",
"7",
"7",
"2",
"0",
"3",
"0",
"9",
"1",
"7",
"9",
"8",
"0",
"5",
"7",
"6",
"2",
"8",
"6",
"2",
"1",
"3",
"5",
"4",
"4",
"8",
"6",
"2",
"2",
"7",
"0",
"5",
"2",
"6",
"0",
"4",
"6",
"2",
"8",
"1",
"8",
"9",
"0",
"2",
"4",
"4",
"9",
"7",
"0",
"7",
"2",
"0",
"7",
"2",
"0"
] |
[
"nonn",
"cons",
"easy"
] | 10 | 3 | 1 |
[
"A001622",
"A002163",
"A377796",
"A377797",
"A377798",
"A377799"
] | null |
Paolo Xausa, Nov 08 2024
| 2024-11-08T11:38:22 |
oeisdata/seq/A377/A377797.seq
|
9beb1c3023b2920936f3e65b831eb92a
|
A377798
|
Decimal expansion of the circumradius of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length.
|
[
"3",
"8",
"0",
"2",
"3",
"9",
"4",
"4",
"9",
"9",
"8",
"5",
"1",
"2",
"9",
"3",
"5",
"8",
"4",
"7",
"6",
"6",
"8",
"3",
"6",
"7",
"1",
"4",
"1",
"1",
"0",
"3",
"2",
"3",
"2",
"0",
"9",
"3",
"0",
"3",
"8",
"9",
"2",
"8",
"6",
"5",
"2",
"5",
"1",
"2",
"8",
"5",
"6",
"2",
"1",
"1",
"8",
"9",
"2",
"8",
"4",
"3",
"9",
"8",
"2",
"3",
"4",
"3",
"9",
"6",
"1",
"4",
"2",
"2",
"8",
"9",
"2",
"1",
"2",
"6",
"6",
"5",
"7",
"3",
"7",
"7",
"7",
"8",
"2",
"4"
] |
[
"nonn",
"cons",
"easy"
] | 7 | 1 | 1 |
[
"A010499",
"A344171",
"A377796",
"A377797",
"A377798",
"A377799"
] | null |
Paolo Xausa, Nov 08 2024
| 2024-11-08T11:38:25 |
oeisdata/seq/A377/A377798.seq
|
e922d8e97fda832783ef0b580b5dbd49
|
A377799
|
Decimal expansion of the midradius of a truncated icosidodecahedron (great rhombicosidodecahedron) with unit edge length.
|
[
"3",
"7",
"6",
"9",
"3",
"7",
"7",
"1",
"2",
"7",
"9",
"2",
"1",
"7",
"1",
"6",
"6",
"0",
"2",
"6",
"7",
"2",
"2",
"6",
"4",
"2",
"0",
"0",
"6",
"6",
"1",
"9",
"4",
"2",
"4",
"3",
"5",
"6",
"3",
"0",
"0",
"5",
"1",
"5",
"7",
"1",
"9",
"6",
"1",
"7",
"2",
"8",
"3",
"9",
"2",
"0",
"1",
"7",
"9",
"7",
"6",
"7",
"9",
"1",
"4",
"6",
"1",
"1",
"5",
"6",
"3",
"4",
"7",
"3",
"8",
"9",
"4",
"3",
"6",
"8",
"5",
"4",
"8",
"2",
"7",
"6",
"4",
"9",
"2",
"4"
] |
[
"nonn",
"cons",
"easy"
] | 6 | 1 | 1 |
[
"A010499",
"A344171",
"A377796",
"A377797",
"A377798",
"A377799"
] | null |
Paolo Xausa, Nov 08 2024
| 2024-11-08T11:38:28 |
oeisdata/seq/A377/A377799.seq
|
544eb09b18373a1dc6371fd64d2fffe5
|
A377800
|
Numbers k such that (33^k - 2^k)/31 is prime.
|
[
"71",
"103",
"1213",
"2441",
"2789",
"4159"
] |
[
"nonn",
"hard",
"more"
] | 6 | 1 | 1 |
[
"A062587",
"A062589",
"A127996",
"A127997",
"A128344",
"A204940",
"A217320",
"A225807",
"A229542",
"A375161",
"A375236",
"A377031",
"A377800"
] | null |
Robert Price, Nov 07 2024
| 2025-02-16T08:34:07 |
oeisdata/seq/A377/A377800.seq
|
c6fd995df1f059cf6d8a7549f75c6b30
|
A377801
|
Irregular triangle read by rows: row n lists divisors of n-th Bell number.
|
[
"1",
"1",
"1",
"2",
"1",
"5",
"1",
"3",
"5",
"15",
"1",
"2",
"4",
"13",
"26",
"52",
"1",
"7",
"29",
"203",
"1",
"877",
"1",
"2",
"3",
"4",
"5",
"6",
"9",
"10",
"12",
"15",
"18",
"20",
"23",
"30",
"36",
"45",
"46",
"60",
"69",
"90",
"92",
"115",
"138",
"180",
"207",
"230",
"276",
"345",
"414",
"460",
"690",
"828",
"1035",
"1380",
"2070",
"4140",
"1",
"3",
"7",
"19",
"21",
"53",
"57",
"133",
"159",
"371",
"399",
"1007",
"1113",
"3021",
"7049",
"21147"
] |
[
"nonn",
"tabf"
] | 24 | 0 | 4 |
[
"A000110",
"A027750",
"A262349",
"A278973",
"A279623",
"A377801"
] | null |
Vincenzo Librandi, Nov 07 2024
| 2024-11-13T08:30:33 |
oeisdata/seq/A377/A377801.seq
|
b6305fe3ca4da570e181a8270b276f15
|
A377802
|
Triangle read by rows: T(n, k) = (2 * (n+1)^2 + 7 - (-1)^n) / 8 - k.
|
[
"1",
"2",
"1",
"4",
"3",
"2",
"6",
"5",
"4",
"3",
"9",
"8",
"7",
"6",
"5",
"12",
"11",
"10",
"9",
"8",
"7",
"16",
"15",
"14",
"13",
"12",
"11",
"10",
"20",
"19",
"18",
"17",
"16",
"15",
"14",
"13",
"25",
"24",
"23",
"22",
"21",
"20",
"19",
"18",
"17",
"30",
"29",
"28",
"27",
"26",
"25",
"24",
"23",
"22",
"21",
"36",
"35",
"34",
"33",
"32",
"31",
"30",
"29",
"28",
"27",
"26",
"42",
"41",
"40",
"39",
"38",
"37",
"36",
"35",
"34",
"33",
"32",
"31"
] |
[
"nonn",
"easy",
"tabl"
] | 9 | 1 | 2 |
[
"A000290",
"A002061",
"A002378",
"A002620",
"A004116",
"A005563",
"A006003",
"A014616",
"A024206",
"A026741",
"A033638",
"A246694",
"A290743",
"A377802"
] | null |
Werner Schulte, Nov 07 2024
| 2024-11-15T23:33:42 |
oeisdata/seq/A377/A377802.seq
|
b3beda1bfdaf81f9838cf9baf9daf48f
|
A377803
|
Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 - log(1-3*x) / 3) ).
|
[
"1",
"1",
"5",
"51",
"798",
"16914",
"453294",
"14704542",
"560274336",
"24529661568",
"1213557885720",
"66956662956600",
"4076440417367856",
"271472012197547472",
"19631093304600307152",
"1531919987372848152240",
"128314172533501646058240",
"11482569303348317402868480",
"1093343670892117401737893632"
] |
[
"nonn"
] | 14 | 0 | 3 |
[
"A138013",
"A352069",
"A370907",
"A370939",
"A377737",
"A377790",
"A377803"
] | null |
Seiichi Manyama, Nov 08 2024
| 2024-11-08T08:03:02 |
oeisdata/seq/A377/A377803.seq
|
a2cc44d0e452e0ec332ea276bdd5ef6e
|
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