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Number of 9*n X 9 0..2 arrays with row sums 2 and column sums 2*n
1

%I #4 Mar 31 2012 12:35:41

%S 41514583320,2402820978940192425615000,

%T 384184227197088213207839624049360408000,

%U 95131219937961621952706904277268129938808819520975000

%N Number of 9*n X 9 0..2 arrays with row sums 2 and column sums 2*n

%H R. H. Hardin, <a href="/A172721/b172721.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2010