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 A012048 arctanh(sin(tanh(x)))=x-1/3!*x^3+1/5!*x^5+55/7!*x^7-2207/9!*x^9... 0
 1, -1, 1, 55, -2207, 79727, -2834207, 81045991, 1107720001, -715785186337, 165075476417857, -44818254949260905, 14626040239803925921, -5177396773524357363889, 1885895392048206524730145 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..14. MATHEMATICA With[{nn=30}, Take[CoefficientList[Series[ArcTanh[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Mar 07 2017 *) CROSSREFS Sequence in context: A346325 A240687 A053113 * A215860 A020536 A212788 Adjacent sequences: A012045 A012046 A012047 * A012049 A012050 A012051 KEYWORD sign AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) STATUS approved

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Last modified December 2 20:08 EST 2023. Contains 367526 sequences. (Running on oeis4.)