A012485 - OEIS

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A012485

cos(cos(x)*arcsin(x))=1-1/2!*x^2+9/4!*x^4-105/6!*x^6+1393/8!*x^8...

1, -1, 9, -105, 1393, -71025, -898887, -455252889, -75822681503, -21366754787169, -7036035942040855, -2891117170991668553, -1426147181806835610927, -835104626729810211267025

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Cos[Cos[x]ArcSin[x]], {x, 0, nn}], x] Range[ 0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Oct 14 2022 *)

CROSSREFS

Sequence in context: A081461 A231646 A110698 * A052503 A261428 A122569

Adjacent sequences: A012482 A012483 A012484 * A012486 A012487 A012488

KEYWORD

sign

AUTHOR

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

STATUS

approved