%I #5 Mar 31 2012 12:34:58
%S 0,1,8,256,17408,1910656,309060608,69341479936,20585851486208,
%T 7805361597546496,3678560956503031808,2108887897093614862336,
%U 1444987869648059585527808,1166088560957891800314413056
%N Expansion of tan(tan(x)^2)/2.
%t Tan[ Tan[ x ]^2 ]/2 (* Even Part *)
%Y A009710.
%K nonn
%O 0,3
%A _R. H. Hardin_
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