A013433 - OEIS

A013433

-arctan(arcsin(x)-arctanh(x))=1/3!*x^3+15/5!*x^5+495/7!*x^7+28735/9!*x^9...

0, 1, 15, 495, 28735, 2597175, 337740975, 59815330575, 13857008709375, 4071452200086375, 1480690661198331375, 653488912610356197375, 344332933648569891309375, 213657034023415650312084375

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

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

CROSSREFS

Sequence in context: A218198 A377045 A208624 * A013435 A151816 A013431

Adjacent sequences: A013430 A013431 A013432 * A013434 A013435 A013436

KEYWORD

nonn

AUTHOR

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

STATUS

approved