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A009226
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Expansion of e.g.f.: exp(sinh(x))/cosh(x).
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0
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1, 1, 0, -1, 4, 17, -24, -201, 848, 7041, -25792, -291025, 1491392, 18979729, -106879616, -1597285977, 10504954112, 176766161281, -1298259085312, -24470008076193, 200164547589120, 4166922390589073, -37466482286032896
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OFFSET
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0,5
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LINKS
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Exp[Sinh[x]]/Cosh[x], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Sep 23 2012 *)
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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