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A013176 arcsin(arctanh(x)+arctan(x))=2*x+8/3!*x^3+336/5!*x^5+32832/7!*x^7... 0
2, 8, 336, 32832, 6596352, 2172377088, 1074790176768, 742942875451392, 684332863424888832, 809904627202731540480, 1197620189653593343131648, 2163726873433446527375769600, 4689766098958031240193965555712 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTanh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Aug 22 2014 *)

CROSSREFS

Sequence in context: A012999 A013003 A009707 * A220904 A009489 A102597

Adjacent sequences:  A013173 A013174 A013175 * A013177 A013178 A013179

KEYWORD

nonn

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Definition clarified by Harvey P. Dale, Aug 22 2014

STATUS

approved

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)