A012426 arcsinh(arctan(x)*sin(x))=2/2!*x^2-12/4!*x^4+70/6!*x^6+2856/8!*x^8...

2, -12, 70, 2856, -164342, -26727140, 9513652174, -1509132606128, -24850989613038, 96289752279508804, -8229825010792301226, -30295913573130207257992, 26332910393982197524318746

Offset

0,1

Links

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

Mathematica

Take[With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcTan[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!]], {3, -1, 2}] (* Harvey P. Dale, Oct 24 2025 *)

Crossrefs

Sequence in context: A001251 A143357 A357831 * A012421 A012381 A012376

Adjacent sequences: A012423 A012424 A012425 * A012427 A012428 A012429

Keyword

sign

Author

Patrick Demichel

Status

approved