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A013107 arctan(arcsinh(x)+arctan(x))=2*x-19/3!*x^3+1041/5!*x^5-141489/7!*x^7... 0
2, -19, 1041, -141489, 35842401, -14587836921, 8707393003617, -7166002987401489, 7776862795242656577, -10760731866324884664297, 18490186709158886988610113, -38627726709262739118225523137 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..11.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcSinh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Ray Chandler, Nov 29 2016 *)

CROSSREFS

Sequence in context: A013052 A012956 A012976 * A172028 A024229 A094663

Adjacent sequences:  A013104 A013105 A013106 * A013108 A013109 A013110

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified November 27 04:21 EST 2020. Contains 338677 sequences. (Running on oeis4.)