A325871 a(n) = n!*ClausenNumber(n, 1)/(n + 1), Clausen numbers defined in A160014.

1, 1, 4, 3, 144, 40, 4320, 1260, 134400, 72576, 21772800, 6652800, 100590336000, 889574400, 34871316480, 163459296000, 627683696640000, 39520825344000, 268899695640576000, 12164510040883200, 38231317271347200000, 4644631106519040000, 6744004366665646080000

Offset: 0

Author

Peter Luschny, Jun 26 2019

Keywords

• nonn

Crossrefs

Cf. A160014, A194587.

Programs

Maple

# Function Clausen defined in A160014.
seq(n!*Clausen(n,1)/(n+1), n=0..27);

Formula

a(n) = A194587(n, n).