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%I #4 Mar 31 2012 12:35:41
%S 0,1,55,27636,45934340,210668680701,2310106618930215,
%T 54450121092072227480,2538708180710780880644304,
%U 218999995866993338639652628800,33082630485031588732233929380223040
%N Number of n X n 0..3 arrays with row sums 6 and column sums 6
%H R. H. Hardin, <a href="/A172722/b172722.txt">Table of n, a(n) for n=1..25</a>
%K nonn
%O 1,3
%A _R. H. Hardin_ Feb 06 2010
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