OFFSET
0,1
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Sin[ArcTan[x]Tan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Dec 20 2014 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
More terms from Harvey P. Dale, Dec 20 2014
STATUS
approved