A012370 arcsinh(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4-58/6!*x^6-1976/8!*x^8...

2, 4, -58, -1976, 116042, 17175244, -594271858, -470273780336, -11672416091758, 34320709687067284, 5944386529990688342, -5070047337737884665896, -2469435785086687214539558

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[Tan[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Mar 06 2019 *)

Crossrefs

Sequence in context: A362735 A185182 A098626 * A012366 A009513 A242737

Adjacent sequences: A012367 A012368 A012369 * A012371 A012372 A012373

Keyword

sign

Author

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

Status

approved