OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[x]]*Sin[x]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Aug 26 2020 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
Previous Mathematica program replaced by Harvey P. Dale, Aug 26 2020
STATUS
approved