A009782 - OEIS

A009782

E.g.f.: expansion of tanh(log(1+x))/exp(x).

0, 1, -3, 6, -4, -45, 339, -1442, 2064, 33309, -425935, 2853246, -6127188, -142899809, 2558171511, -23368092810, 66908903744, 2040609258393, -46968028923771, 543448366366294, -1945041831809220, -73278278468928309

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OFFSET

0,3

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, Mar 09 2013 *)

CROSSREFS

Sequence in context: A145691 A245767 A367302 * A294670 A016615 A224746

Adjacent sequences: A009779 A009780 A009781 * A009783 A009784 A009785

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

Definition clarified by Harvey P. Dale, Mar 09 2013

STATUS

approved