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%I #4 Mar 31 2012 12:35:42
%S 1,18152,513799394688,3453235602818369547520,
%T 1835784677576057001102381224194900,
%U 37246115504386074787217299933684238287194514560
%N Number of 3*n X n 0..7 arrays with row sums 7 and column sums 21
%H R. H. Hardin, <a href="/A172936/b172936.txt">Table of n, a(n) for n=1..10</a>
%K nonn
%O 1,2
%A _R. H. Hardin_ Feb 06 2010
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