A012722 arcsinh(arctanh(x)*sin(x))=2/2!*x^2+4/4!*x^4-10/6!*x^6+1160/8!*x^8...

2, 4, -10, 1160, 267178, 25749260, 1675836318, 292637394192, 163260945099858, 64904840292491284, 19017877552509443654, 7018293499345186438552, 5539610614858975449636346

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcTanh[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Jun 16 2013 *)

Crossrefs

Sequence in context: A355203 A327059 A012555 * A012616 A012611 A356109

Adjacent sequences: A012719 A012720 A012721 * A012723 A012724 A012725

Keyword

sign

Author

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

Status

approved