OFFSET
0,4
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..200
EXAMPLE
sin(tan(x)) = x + 1/6*x^3 - 1/40*x^5 - 55/1008*x^7 - 143/3456*x^9 + ...
MATHEMATICA
Numerator[Take[CoefficientList[Series[Sin[Tan[x]], {x, 0, 40}], x], {2, -1, 2}]] (* G. C. Greubel, Nov 17 2016 *)
CROSSREFS
KEYWORD
sign,frac
AUTHOR
N. J. A. Sloane, Aug 15 2004
STATUS
approved