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 A012341 arcsin(arcsin(x)*arcsin(x))=2/2!*x^2+8/4!*x^4+248/6!*x^6+11328/8!*x^8... 0
 0, 2, 8, 248, 11328, 1091232, 148080000, 30317577600, 8228536780800, 2957031184028160, 1336782441018009600, 749500660718368634880, 508063303148296391147520, 410659058984740631962951680 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA a(n) ~ sqrt(tan(1)) * (2*n)! / (sqrt(2*Pi) * n^(3/2) * (sin(1))^(2*n)). - Vaclav Kotesovec, Feb 08 2015 MATHEMATICA nn = 20; Table[(CoefficientList[Series[ArcSin[ArcSin[x]^2], {x, 0, 2*nn}], x] * Range[0, 2*nn]!)[[n]], {n, 1, 2*nn+1, 2}] (* Vaclav Kotesovec, Feb 08 2015 *) CROSSREFS Sequence in context: A067583 A120378 A012345 * A299374 A203317 A258161 Adjacent sequences: A012338 A012339 A012340 * A012342 A012343 A012344 KEYWORD nonn AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) EXTENSIONS a(0)=0 prepended by Vaclav Kotesovec, Feb 08 2015 STATUS approved

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Last modified December 6 04:57 EST 2022. Contains 358594 sequences. (Running on oeis4.)