A012815 arcsin(sec(x)*sinh(x))=x+5/3!*x^3+85/5!*x^5+3985/7!*x^7+379625/9!*x^9...

1, 5, 85, 3985, 379625, 60812765, 14677835965, 4970543866345, 2246783432849105, 1306543181979948725, 950061718955626219045, 844558265482290124163905, 901064938302237380563065785

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Sec[x]Sinh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Sep 01 2024 *)

Crossrefs

Sequence in context: A012788 A208886 A192055 * A113107 A317355 A018925

Adjacent sequences: A012812 A012813 A012814 * A012816 A012817 A012818

Keyword

nonn

Author

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

Status

approved