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A009687 Expansion of sinh(sin(x))*sin(x)/2. 0
1, 116, 221776, 2035313216, 57114906593536, 3831406959743783936, 525282700343846052745216, 132012923141044737907744587776, 56143990156951992731353775556591616 (list; graph; refs; listen; history; text; internal format)
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 * A050660 A176568 A023682

Adjacent sequences:  A009684 A009685 A009686 * A009688 A009689 A009690

KEYWORD

nonn

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested 03/97.

STATUS

approved

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Last modified January 18 17:18 EST 2022. Contains 350455 sequences. (Running on oeis4.)