A362292 a(n) = (n+1/3)^n * (3*n)!/n!.

1, 8, 1960, 2240000, 7037430400, 47023181004800, 573855569801113600, 11561744236447268864000, 357878145625000000000000000, 16126894605060719806880153600000, 1014615361149039162308699493990400000, 86191463407361600308443922239271731200000

Offset

0,2

Links

Winston de Greef, Table of n, a(n) for n = 0..141

Prog

(PARI) a(n) = (n+1/3)^n*(3*n)!/n!;

Crossrefs

Cf. A000169, A034940.

Sequence in context: A302471 A303253 A076955 * A024112 A092414 A295217

Adjacent sequences: A362289 A362290 A362291 * A362293 A362294 A362295

Keyword

nonn,easy

Author

Seiichi Manyama, Apr 14 2023

Status

approved