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A009785 Expansion of tanh(log(1+x)*exp(x)). 0
0, 1, 1, 0, -12, -45, -65, 1400, 12096, 52269, -469307, -8565656, -73323052, 223125903, 11882866931, 176275489312, 328262199968, -26579607201031, -672646430878551, -4665154122148880, 76898559105113236, 3784100596619704043 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

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

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Tanh[Log[1+x]*Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Sep 14 2018 *)

CROSSREFS

Sequence in context: A309817 A340305 A194284 * A135710 A070996 A015237

Adjacent sequences:  A009782 A009783 A009784 * A009786 A009787 A009788

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

Previous Mathematica program replaced by Harvey P. Dale, Sep 14 2018

STATUS

approved

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Last modified February 25 08:28 EST 2021. Contains 341596 sequences. (Running on oeis4.)