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A013354
arctan(sin(x)-tan(x))=-3/3!*x^3-15/5!*x^5-273/7!*x^7+7185/9!*x^9...
0
-3, -15, -273, 7185, 893607, 110604585, 6777315087, -405484606815, -441813428161833, -137423041821531015, -28797568231809153153, 2268330081740331047985, 6518378202627257740085127
OFFSET
0,1
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcTan[Sin[x]-Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {4, -1, 2}]] (* Harvey P. Dale, Jul 05 2019 *)
CROSSREFS
Sequence in context: A326263 A120607 A013352 * A013356 A013353 A270401
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved