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%I #9 Apr 02 2017 15:21:45
%S 0,1,-2,-117,3356,176405,-25528806,-511975457,554197425592,
%T -35655181253847,-25582284242683210,6598119430000033331,
%U 1878722559559319754708,-1478103068989901067214787,-77274866172665629115051054
%N Expansion of tanh(sin(x)*x)/2.
%t Tanh[ Sin[ x ]*x ]/2 (* Even Part *)
%Y Cf. A009800.
%K sign
%O 0,3
%A _R. H. Hardin_
%E Extended with signs Mar 1997
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