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%I #13 Jan 27 2014 09:12:48
%S 1,1,1,6,21,112,717,4592,38857,318208,3158329,32169984,363525789,
%T 4399544320,56250039237,779244812288,11210469917713,173483433263104,
%U 2783865475754737,47421793222656000,840008000833503141
%N Expansion of exp(tan(x)/cos(x)).
%t With[{nn=30},CoefficientList[Series[Exp[Tan[x]/Cos[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Sep 30 2012 *)
%K nonn,easy
%O 0,4
%A _R. H. Hardin_
%E Extended and signs tested Mar 15 1997 by _Olivier Gérard_.
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