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%I #3 Mar 31 2012 12:35:07
%S 1,4,24,216,2952,61488,1957392,95392296,7125411888,816458567400,
%T 143601085430064,38787148664334000,16094818374887017440,
%U 10263152688155204724288,10059484565080507620249504
%N 1/3 of the number of 3-colorings of an n X n array symmetric about main diagonal.
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 05 2008
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