OFFSET
1,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..100
EXAMPLE
tan(tan(x)/cosh(x)) = x + 1/6*x^3 + 17/120*x^5 + 593/5040*x^7 + ...
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tan[Tan[x]/Cosh[x]], {x, 0, nn}], x]Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, May 06 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended and signs tested Mar 15 1997 by Olivier Gérard.
STATUS
approved