A013060 - OEIS

A013060

arctan(sinh(x)+arctan(x))=2*x-17/3!*x^3+873/5!*x^5-110799/7!*x^7...

2, -17, 873, -110799, 26183793, -9939372439, 5533091086937, -4246813468523599, 4298292149692645473, -5546746219608789662631, 8888791155284908218974601, -17318307957227833839826977823

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OFFSET

0,1

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcTan[Sinh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Nov 02 2011 *)

CROSSREFS

Sequence in context: A015189 A012944 A013099 * A012988 A261535 A327020

Adjacent sequences: A013057 A013058 A013059 * A013061 A013062 A013063

KEYWORD

sign

AUTHOR

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

STATUS

approved