A012605 tanh(arcsinh(x)*arcsin(x))=2/2!*x^2-152/6!*x^6+227232/10!*x^10...

2, -152, 227232, -795112320, 44292972802560, 2002112058391603200, 937365267083373473341440, 444372302749315420373243166720

Offset

0,1

Links

Table of n, a(n) for n=0..7.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Tanh[ArcSinh[x]ArcSin[x]], {x, 0, nn}], x] Range[ 0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, Dec 14 2020 *)

Crossrefs

Sequence in context: A206309 A265880 A064436 * A012602 A157087 A332585

Adjacent sequences: A012602 A012603 A012604 * A012606 A012607 A012608

Keyword

sign

Author

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

Status

approved