%I #4 Mar 30 2012 18:56:54
%S 0,0,0,0,0,0,5,6,7,21,24,27,90,105,121,385,450,520,1651,1939,2255,
%T 7175,8456,9877,31416,37122,43510,138510,164025,192801,614019,728409,
%U 858199,2734171,3248322,3834655,12220780,14536951,17189667
%N Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= (n-1)/3.
%K nonn
%O 1,7
%A _Clark Kimberling_