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A009715 Expansion of tan(tanh(x))*cos(x). 0
1, -3, -3, 273, -5159, -62139, 16414101, -1357293927, 59192332081, 5204089208589, -1943937262679379, 331586038355507361, -32236263434125968887, -1484274347735103183531, 1139055571050751311941445 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..14.

MATHEMATICA

Tan[ Tanh[ x ] ]*Cos[ x ] (* Odd Part *)

CROSSREFS

Sequence in context: A113457 A113466 A007301 * A335258 A292163 A242886

Adjacent sequences:  A009712 A009713 A009714 * A009716 A009717 A009718

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified September 27 00:14 EDT 2020. Contains 337378 sequences. (Running on oeis4.)