A009687 Expansion of sinh(sin(x))*sin(x)/2.

1, 116, 221776, 2035313216, 57114906593536, 3831406959743783936, 525282700343846052745216, 132012923141044737907744587776, 56143990156951992731353775556591616

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Mathematica

Tan[ Sinh[ x ]*Sin[ x ] ]/2 (* [ x^(4n+2) ] *)

Crossrefs

A024347.

Sequence in context: A284377 A009617 A201728 * A373582 A050660 A176568

Adjacent sequences: A009684 A009685 A009686 * A009688 A009689 A009690

Keyword

nonn

Author

R. H. Hardin

Extensions

Extended and signs tested 03/97.

Status

approved