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 A012187 arctan(arctan(sin(x)))=x-5/3!*x^3+129/5!*x^5-8133/7!*x^7+941601/9!*x^9... 0
 1, -5, 129, -8133, 941601, -173748453, 46802237793, -17335271239653, 8453548403430081, -5250998394750249285, 4048144275997010258625, -3792939800731791655328133, 4245216299498829593948709345 (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[ArcTan[ArcTan[Sin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Feb 09 2015 *) CROSSREFS Sequence in context: A012136 A012022 A012176 * A012083 A012226 A281818 Adjacent sequences: A012184 A012185 A012186 * A012188 A012189 A012190 KEYWORD sign AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) EXTENSIONS Definition clarified by Harvey P. Dale, Feb 09 2015 STATUS approved

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Last modified May 29 10:34 EDT 2023. Contains 363029 sequences. (Running on oeis4.)