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A012087 Expansion of e.g.f.: exp(arcsin(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4+4/5!*x^5+69/6!*x^6... 0
1, 1, 1, 0, -3, 4, 69, -32, -2503, 1936, 177481, -67328, -18539595, 4140096, 2813939725, 353591808, -573509386895, -262064131840, 152349815266705, 130347373404160, -50966873710838675, -65058714844462080 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Exp[ArcSin[ArcTan[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 27 2018 *)

CROSSREFS

Sequence in context: A274699 A060356 A052323 * A012194 A318208 A341851

Adjacent sequences:  A012084 A012085 A012086 * A012088 A012089 A012090

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Definition clarified by Harvey P. Dale, May 27 2018

STATUS

approved

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Last modified May 21 03:13 EDT 2022. Contains 353886 sequences. (Running on oeis4.)