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A009296
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Expansion of exp(x)/cosh(sinh(x)).
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0
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1, 1, 0, -2, -4, -4, 24, 176, 272, -1712, -14528, -66912, 181312, 4737344, 20265088, -53926656, -1771263744, -18559434496, 4388386816, 1869838374400, 16325400792064, 35429689535488, -1796402984175616, -36301265658269696
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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MATHEMATICA
| With[{nn=30}, CoefficientList[Series[Exp[x]/Cosh[Sinh[x]], {x, 0, nn}], x] Range[0, nn]!] (* From Harvey P. Dale, Sep 18 2011 *)
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CROSSREFS
| Sequence in context: A155725 A103973 A129826 * A068554 A092524 A155952
Adjacent sequences: A009293 A009294 A009295 * A009297 A009298 A009299
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KEYWORD
| sign,easy
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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EXTENSIONS
| Extended with signs Mar 15 1997 by Olivier Gerard.
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