A012093 arcsinh(arcsin(arctan(x)))=x-2/3!*x^3+32/5!*x^5-1224/7!*x^7+89984/9!*x^9...

1, -2, 32, -1224, 89984, -10705408, 1889967232, -464238999808, 151661217091584, -63641246944645120, 33381024310383640576, -21408234533329528127488, 16485197581627921671815168

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcSin[ArcTan[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 02 2025 *)

Crossrefs

Sequence in context: A012114 A055929 A012237 * A012214 A320419 A012140

Adjacent sequences: A012090 A012091 A012092 * A012094 A012095 A012096

Keyword

sign

Author

Patrick Demichel

Status

approved