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%I #9 Apr 02 2017 15:22:07
%S 0,1,-2,123,-3364,307445,-27693606,4225124911,-763609828808,
%T 186062503278825,-54699231827563210,19846874921743244771,
%U -8537442340155261028332,4342042121637684282920413
%N Expansion of tan(sin(x)*x)/2.
%t Tan[ Sin[ x ]*x ]/2 (* Even Part *)
%Y Cf. A009673.
%K sign
%O 0,3
%A _R. H. Hardin_
%E Extended with signs Mar 1997
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