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A012795 arcsin(sec(x)*tan(x))=x+6/3!*x^3+120/5!*x^5+6216/7!*x^7+652800/9!*x^9... 0
1, 6, 120, 6216, 652800, 115944576, 31101732480, 11717149191936, 5895158281052160, 3816842537847607296, 3090738173477544099840, 3060041827367678200774656, 3636490261219371329053163520 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Sec[x]Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jul 18 2013 *)

CROSSREFS

Sequence in context: A012846 A331640 A012641 * A054479 A012475 A053777

Adjacent sequences:  A012792 A012793 A012794 * A012796 A012797 A012798

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified November 28 01:24 EST 2021. Contains 349396 sequences. (Running on oeis4.)