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A009245
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Expansion of exp(tan(x))/cosh(x).
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0
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1, 1, 0, 0, 8, 32, 56, 280, 3968, 27520, 133248, 1072896, 13993088, 137702528, 1139191808, 12544190464, 178943504384, 2268209053696, 26439024316416, 366953307820032, 5943319707680768, 91839717688770560
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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[Tan[x]]/Cosh[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 01 2016 *)
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CROSSREFS
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KEYWORD
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nonn,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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