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%I #4 Mar 30 2012 18:56:54
%S 0,0,0,0,0,1,2,12,42,63,168,378,504,1014,1914,2420,4620,9295,12012,
%T 27027,63083,84119,199304,456484,601664,1339464,2896664,3755844,
%U 8093214,17441739,22591800,49876200,111029050,144780009
%N Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-1)/3.
%K nonn
%O 1,7
%A _Clark Kimberling_
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