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A009267 Expansion of exp(tanh(x)*cos(x)). 0
1, 1, 1, -4, -19, -8, 397, 1752, -7943, -117312, -64551, 7882624, 43466469, -537535360, -7570028763, 27307332608, 1224976528753, 2518262718464, -203222727578703, -1691557864632320, 33945910273599581, 611413449329426432 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

MATHEMATICA

Exp[ Tanh[ x ]*Cos[ x ] ]

CROSSREFS

Sequence in context: A222323 A012496 A024572 * A009275 A070612 A165820

Adjacent sequences:  A009264 A009265 A009266 * A009268 A009269 A009270

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 July 15 16:09 EDT 2019. Contains 325049 sequences. (Running on oeis4.)