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A009361
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Expansion of e.g.f.: log(1+sinh(x)/cos(x)).
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0
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0, 1, -1, 6, -22, 140, -976, 8456, -83952, 957840, -12249856, 174293856, -2725714432, 46514037440, -859767771136, 17115342333056, -365039421683712, 8304761365213440, -200743169243938816, 5137820023434733056
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Log[1+Sinh[x]/Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Apr 19 2018 *)
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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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Definition clarified and prior Mathematica program replaced by Harvey P. Dale, Apr 19 2018
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STATUS
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approved
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