A012080 E.g.f.: sinh(arcsin(tan(x)))=x+4/3!*x^3+76/5!*x^5+3424/7!*x^7+285136/9!*x^9...

1, 4, 76, 3424, 285136, 38302144, 7603381696, 2097552753664, 768471264000256, 361133162545705984, 211820037816772258816, 151696192774576615727104, 130270853179191716758245376

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sinh[ArcSin[Tan[x]]], {x, 0, nn}], x]Range[0, nn-1]!, {2, -1, 2}]]  (* Harvey P. Dale, May 24 2012 *)

Crossrefs

Sequence in context: A012041 A024258 A012101 * A012047 A012010 A012155

Adjacent sequences: A012077 A012078 A012079 * A012081 A012082 A012083

Keyword

nonn

Author

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

Extensions

Definition clarified by Harvey P. Dale, May 24 2012

Status

approved