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%I #8 Jan 27 2014 09:12:45
%S 1,0,12,480,25872,2031360,227781312,34846855680,6932161765632,
%T 1724433365360640,521307469175442432,187630895361738301440,
%U 79180079598904589094912,38701262478049196612321280
%N Expansion of cosh(tan(x)^2).
%t Cosh[ Tan[ x ]^2 ] (* Even Part *)
%K nonn
%O 0,3
%A _R. H. Hardin_
%E Extended and signs tested Mar 15 1997 by _Olivier Gérard_.