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A012140
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arcsinh(arcsin(arctanh(x)))=x+2/3!*x^3+32/5!*x^5+1336/7!*x^7...
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0
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1, 2, 32, 1336, 108800, 14701312, 2986596480, 852635258112, 325714440802304, 160437668874481664, 98998538588401238016, 74780329820590921056256, 67860526461080359727955968, 72835853250644384064569933824
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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[ArcSinh[ArcSin[ArcTanh[x]]], {x, 0, nn}], x] Range[ 0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jan 09 2023 *)
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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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STATUS
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approved
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