A012088 arcsin(arcsin(arctan(x)))=x+12/5!*x^5-88/7!*x^7+13968/9!*x^9...

1, 0, 12, -88, 13968, -597440, 132709184, -15685157504, 5014687029504, -1181425359497216, 528315488687774720, -207409825492284028928, 125603683629593633394688, -73594034552724198387236864

Offset

0,3

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcSin[ArcTan[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 30 2021 *)

Crossrefs

Sequence in context: A126507 A181704 A009657 * A083825 A181944 A359311

Adjacent sequences: A012085 A012086 A012087 * A012089 A012090 A012091

Keyword

sign

Author

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

Status

approved