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A012695
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arctan(tanh(x)*arcsinh(x))=2/2!*x^2-12/4!*x^4-50/6!*x^6+14280/8!*x^8...
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0
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2, -12, -50, 14280, -826502, -49633540, 25407386758, -3395749736176, -840874377633678, 669385496489774468, -130679263245845309250, -109382532060795384014888, 114810087622932492884439786
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history;
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internal format)
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[ArcTan[Tanh[x]ArcSinh[x]], {x, 0, nn}], x] Range[ 0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Jun 07 2022 *)
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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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