A012640 arcsinh(arcsinh(x)*cos(x))=x-5/3!*x^3+73/5!*x^5-3565/7!*x^7...

1, -5, 73, -3565, 337873, -53181845, 12563583641, -4158179320061, 1836546568939681, -1043609929405146661, 741652625178569817577, -644417189348695489885965, 672084091294680203529876081

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSinh[ArcSinh[x]Cos[x]], {x, 0, nn}], x]Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Sep 16 2011 *)

Crossrefs

Sequence in context: A370542 A334282 A317341 * A353042 A128889 A131958

Adjacent sequences: A012637 A012638 A012639 * A012641 A012642 A012643

Keyword

sign

Author

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

Status

approved