A012987 arcsin(arctan(x)+arcsin(x))=2*x+7/3!*x^3+281/5!*x^5+26177/7!*x^7...

2, 7, 281, 26177, 5040953, 1583032653, 746492313069, 491286421003617, 430704974221071057, 485015732780851752021, 682312690169782121262933, 1172627483603034267343876041, 2417509824116710251212901804537

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTan[x]+ArcSin[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 05 2025 *)

Crossrefs

Sequence in context: A013058 A013097 A037067 * A187603 A290637 A260967

Adjacent sequences: A012984 A012985 A012986 * A012988 A012989 A012990

Keyword

nonn

Author

Patrick Demichel

Status

approved