A012198 - OEIS

A012198

arcsinh(arctan(arcsin(x)))=x-2/3!*x^3+32/5!*x^5-1056/7!*x^7+77696/9!*x^9...

1, -2, 32, -1056, 77696, -8411776, 1476954112, -342658078720, 110693077745664, -44684649940516864, 23059986721115963392, -14340030701132323422208, 10822861233504969629892608

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcTan[ArcSin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Nov 28 2013 *)

CROSSREFS

Sequence in context: A211488 A012119 A282835 * A012114 A055929 A012237

Adjacent sequences: A012195 A012196 A012197 * A012199 A012200 A012201

KEYWORD

sign

AUTHOR

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

STATUS

approved