OFFSET
0,2
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Tanh[Tanh[x]*Tan[x]]/2, {x, 0, nn}], x] Range[0, nn-2]!, {3, -1, 4}]] (* Harvey P. Dale, Mar 31 2019 *)
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
Previous Mathematica program replaced by Harvey P. Dale, Mar 31 2019
STATUS
approved