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%I #4 Mar 30 2012 18:56:54
%S 0,0,0,0,0,1,6,21,42,112,252,378,759,1419,1914,3564,6864,9295,20020,
%T 45055,63083,146648,331568,456484,1007454,2156994,2896664,6165494,
%U 13079094,17441739,37871064,82898739,111029050,247813500
%N Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-3)/3.
%K nonn
%O 1,7
%A _Clark Kimberling_
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