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A009432 Expansion of log(1+x)/cosh(sinh(x)). 0
0, 1, -1, -1, 0, 9, -45, 447, -2744, 17553, -171585, 1757535, -19723176, 245370969, -3189613245, 44636677407, -674857335120, 10851333193249, -185485926579489, 3356664148618047, -64009236131219760, 1284480775318317225 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

Log[ 1+x ]/Cosh[ Sinh[ x ] ]

CROSSREFS

Sequence in context: A030113 A001556 A230063 * A145757 A058824 A244302

Adjacent sequences:  A009429 A009430 A009431 * A009433 A009434 A009435

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified September 25 23:58 EDT 2021. Contains 347664 sequences. (Running on oeis4.)