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

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

Offset: 0

Author

Seiichi Manyama, Apr 14 2023

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000169, A034940.

Programs

PARI

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