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A012232
arcsin(arctan(arctanh(x)))=x+1/3!*x^3+17/5!*x^5+505/7!*x^7+32321/9!*x^9...
0
1, 1, 17, 505, 32321, 3196337, 474305361, 96903709929, 26267702181889, 9102885308254561, 3930753230143374609, 2069316409758628885721, 1305070038882436410153793, 971558826878073011961325841
OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTan[ArcTanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Ray Chandler, Nov 28 2016 *)
CROSSREFS
Sequence in context: A130660 A185659 A012792 * A114063 A214135 A193120
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved