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A009439 Expansion of log(1+x)/exp(tanh(x)). 0
0, 1, -3, 8, -16, 29, -191, 1980, -14456, 85713, -657171, 7877880, -97759608, 1100545341, -13021637695, 185198054748, -2933940050000, 46990261427073, -774002505048195, 13811029423532424, -266175983849182016 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

MATHEMATICA

Log[ 1+x ]/Exp[ Tanh[ x ] ]

CROSSREFS

Sequence in context: A009858 A169947 A167616 * A000233 A002624 A293358

Adjacent sequences:  A009436 A009437 A009438 * A009440 A009441 A009442

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 October 15 20:04 EDT 2019. Contains 328037 sequences. (Running on oeis4.)