A100089 - OEIS

A100089

a(n) = (3*n+1)!.

1, 24, 5040, 3628800, 6227020800, 20922789888000, 121645100408832000, 1124000727777607680000, 15511210043330985984000000, 304888344611713860501504000000, 8222838654177922817725562880000000

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

FORMULA

Sum_{n>=0} 1/a(n) = A143820. - Amiram Eldar, Jun 23 2020

MAPLE

seq( (3*n+1)!, n=0..13);

MATHEMATICA

Table[(3*n+1)!, {n, 0, 10}] (* Amiram Eldar, Jun 23 2020 *)

CROSSREFS

Cf. A000142, A143820.

Sequence in context: A184687 A007241 A106207 * A151598 A003787 A002555

Adjacent sequences: A100086 A100087 A100088 * A100090 A100091 A100092

KEYWORD

nonn

AUTHOR

Jorge Coveiro, Dec 26 2004

EXTENSIONS

Offset 0 and a(0) added by Amiram Eldar, Jun 23 2020

STATUS

approved