A012999 arcsin(arctan(x)+tan(x))=2*x+8/3!*x^3+328/5!*x^5+31712/7!*x^7...

2, 8, 328, 31712, 6354304, 2085514752, 1027652193280, 707087567055872, 648127370395910144, 763186372089893650432, 1122739235799995992047616, 2017897729638659884887834624, 4350781970507936954099174998016

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTan[x]+Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jan 03 2022 *)

Crossrefs

Sequence in context: A012541 A054943 A013135 * A013003 A009707 A013176

Adjacent sequences: A012996 A012997 A012998 * A013000 A013001 A013002

Keyword

nonn

Author

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

Status

approved