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A012976
arctan(arctan(x)+sin(x))=2*x-19/3!*x^3+1033/5!*x^5-139921/7!*x^7...
0
2, -19, 1033, -139921, 35331409, -14334032601, 8528641989385, -6996533376858481, 7568756053179558689, -10439411395932267346985, 17880910414730276822733721, -37235878792206753318991025025
OFFSET
0,1
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcTan[x]+Sin[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Apr 05 2016 *)
CROSSREFS
Sequence in context: A128345 A013052 A012956 * A013107 A369946 A350933
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Apr 05 2016
STATUS
approved