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A012646
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exp(arcsinh(x)*sinh(x))=1+2/2!*x^2+12/4!*x^4+160/6!*x^6+2576/8!*x^8...
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0
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1, 2, 12, 160, 2576, 95488, 668096, 402731264, -50491782912, 14988492926976, -4720247498150912, 1909488749227393024, -925515319787778355200, 534630384211887797927936, -362170991481315590982090752
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) ~ (-1)^(n+1) * sin(1) * 2^(2*n) * n^(2*n-1) / exp(2*n + sin(1)*Pi/2). - Vaclav Kotesovec, Nov 01 2013
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Exp[ArcSinh[x]Sinh[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, May 05 2013 *)
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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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