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A012258
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Expansion of e.g.f.: exp(arctanh(arcsin(x)))=1+x+1/2!*x^2+4/3!*x^3+13/4!*x^4+84/5!*x^5...
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1
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1, 1, 1, 4, 13, 84, 469, 4152, 32985, 370128, 3818601, 51861888, 658371429, 10494283968, 158197312701, 2894815734912, 50529852678321, 1043916757274880, 20707179214389201, 476720372375608320
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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[Exp[ArcTanh[ArcSin[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 29 2019 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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STATUS
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approved
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