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A013572
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Expansion of e.g.f. of exp(arcsinh(x)/exp(x)).
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1
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1, 1, -1, -3, 9, 25, -145, -539, 3857, 30129, -192673, -2816979, 17218201, 364417417, -2297788337, -63429766763, 417350455329, 14529736975457, -99514205291841, -4252720982041379, 30285000226110761
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) ~ 2*exp(Pi*sin(1)/2) * sin(1+n*Pi/2-Pi*cos(1)/2) * n^(n-1) / exp(n). - Vaclav Kotesovec, Nov 01 2013
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EXAMPLE
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exp(arcsinh(x)/exp(x)) = 1 + x - 1/2!*x^2 - 3/3!*x^3 + 9/4!*x^4 + 25/5!*x^5 - ..
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Exp[ArcSinh[x]/Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 19 2011 *)
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PROG
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(PARI) x='x + O('x^50); Vec(serlaplace(exp(asinh(x)/exp(x)))) \\ G. C. Greubel, Nov 20 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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