A012788 sinh(sec(x)*arcsin(x))=x+5/3!*x^3+85/5!*x^5+3201/7!*x^7+204905/9!*x^9...

1, 5, 85, 3201, 204905, 19581949, 2608398013, 463598293497, 106484041306577, 30821112722260469, 11011429241275209765, 4772177089034491961201, 2471736193532210009786425, 1510365281819897595496029677

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sinh[Sec[x]*ArcSin[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 07 2013 *)

Crossrefs

Sequence in context: A203800 A277354 A101928 * A208886 A192055 A012815

Adjacent sequences: A012785 A012786 A012787 * A012789 A012790 A012791

Keyword

nonn

Author

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

Status

approved