OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[x]^2]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Dec 31 2014 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
Prior Mathematica program replaced by Harvey P. Dale, Dec 31 2014
STATUS
approved