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A013043
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sech(sinh(x)+arcsin(x))=1-4/2!*x^2+64/4!*x^4-2464/6!*x^6...
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0
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1, -4, 64, -2464, 176000, -20274304, 3418964992, -795860555520, 244118384340992, -95517422279237632, 46396805200416325632, -27406009571869059219456, 19339103621838228194852864
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Sech[Sinh[x]+ArcSin[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Feb 10 2016 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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STATUS
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approved
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