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A009802 Expansion of tanh(sinh(log(1+x))). 0
0, 1, -1, 1, 0, -14, 150, -1322, 10976, -87824, 655920, -3981152, 5308512, 458307760, -12593915152, 254156155888, -4589735470080, 77850265751296, -1250201506099968, 18653867368039168, -241973220007075840 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..20.

MATHEMATICA

Tanh[ Sinh[ Log[ 1+x ] ] ]

CROSSREFS

Sequence in context: A222614 A019521 A009614 * A153598 A180347 A262183

Adjacent sequences:  A009799 A009800 A009801 * A009803 A009804 A009805

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 March 23 18:13 EDT 2019. Contains 321433 sequences. (Running on oeis4.)