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A012052
sin(sin(arctanh(x)))=x-4/5!*x^5-136/7!*x^7-7408/9!*x^9-644416/11!*x^11...
0
1, 0, -4, -136, -7408, -644416, -84562880, -15811723136, -4005496370944, -1317763889887232, -544096638435718144, -274416039275290634240, -165481485047921126273024, -117299354914466636092850176
OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Sin[Sin[ArcTanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jul 06 2023 *)
CROSSREFS
Sequence in context: A012197 A202299 A024264 * A054052 A012070 A366446
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved