OFFSET
0,1
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Tan[ArcTanh[x]ArcTan[x]], {x, 0, nn}], x] Range[0, nn-2]!, {3, -1, 4}]] (* Harvey P. Dale, Sep 24 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by and more terms from Harvey P. Dale, Sep 24 2013
STATUS
approved