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A012196 arctan(arctan(arcsin(x)))=x-3/3!*x^3+57/5!*x^5-2419/7!*x^7+198801/9!*x^9... 0
1, -3, 57, -2419, 198801, -25335395, 4816346441, -1245230547347, 427817295559329, -186336568593526211, 101138532707457916121, -66575531182102753799603, 52444802490227536269748273 (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[ArcTan[ArcTan[ArcSin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Mar 15 2015 *)

CROSSREFS

Sequence in context: A308404 A009723 A069992 * A012090 A210674 A281184

Adjacent sequences:  A012193 A012194 A012195 * A012197 A012198 A012199

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Definition clarified by Harvey P. Dale, Mar 15 2015

STATUS

approved

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Last modified May 26 20:31 EDT 2022. Contains 354092 sequences. (Running on oeis4.)