OFFSET
0,3
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[x]]*Tan[x]/2, {x, 0, nn}], x] Range[ 0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Jan 30 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and signs tested 03/97.
Previous Mathematica program replaced by Harvey P. Dale, Jan 30 2023
STATUS
approved