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A009268 Expansion of e.g.f. exp(tanh(x)*exp(x)). 0
1, 1, 3, 8, 25, 92, 369, 1626, 8033, 42312, 230081, 1354190, 8806769, 59072860, 398252833, 2892141666, 22862362049, 182200364944, 1492258801793, 13163090657814, 111357664397265, 938233188787748, 11338336523834337 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Exp[Tanh[x]Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 31 2012 *)

CROSSREFS

Sequence in context: A033483 A130522 A006219 * A024430 A182927 A012408

Adjacent sequences:  A009265 A009266 A009267 * A009269 A009270 A009271

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 May 25 21:57 EDT 2017. Contains 287060 sequences.