%I #4 Mar 30 2012 18:56:54
%S 0,1,2,3,9,14,20,55,83,119,329,494,714,2001,3002,4367,12375,18563,
%T 27131,77519,116279,170543,490313,735470,1081574,3124549,4686824,
%U 6906899,20030009,30045014,44352164,129024479,193536719,286097759
%N Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n+1)/3.
%K nonn
%O 1,3
%A _Clark Kimberling_
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