A012102 arctan(arcsin(sinh(x)))=x+4/5!*x^5+192/7!*x^7+9616/9!*x^9...

1, 0, 4, 192, 9616, 1115392, 172350528, 37703053312, 10989042954496, 4099556761067520, 1910734175200936960, 1087150572502335373312, 741705342559787764715520, 597689034047543849712812032

Offset

0,3

Links

Table of n, a(n) for n=0..13.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcSin[Sinh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jul 13 2014 *)

Crossrefs

Sequence in context: A123116 A163839 A012015 * A274304 A299999 A007341

Adjacent sequences: A012099 A012100 A012101 * A012103 A012104 A012105

Keyword

nonn

Author

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

Status

approved