%I #4 Mar 30 2012 18:56:54

%S 0,0,0,3,4,5,20,27,35,119,164,219,714,1000,1364,4367,6187,8567,27131,

%T 38759,54263,170543,245156,346103,1081574,1562274,2220074,6906899,

%U 10015004,14307149,44352164,64512239,92561039,286097759

%N Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-1)/3.

%K nonn

%O 1,4

%A _Clark Kimberling_