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A009163
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Expansion of e.g.f.: cosh(tan(x)*log(1+x)).
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0
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1, 0, 0, 0, 12, -60, 570, -3780, 36960, -326592, 3712200, -41836080, 554861736, -7563345504, 114963916704, -1819859452320, 31173297642240, -558346710891904, 10642982507666880, -212150797420894848, 4456607540110934912
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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=20}, CoefficientList[Series[Cosh[Tan[x]*Log[1+x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jul 14 2022 *)
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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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Previous Mathematica program replaced and definition clarified by Harvey P. Dale, Jul 14 2022
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STATUS
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approved
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