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Number of 7*n X 7 0..2 arrays with row sums 3 and column sums 3*n
1

%I #4 Mar 31 2012 12:35:40

%S 3758757240,8610740229284196003000,

%T 42758542523186088601256526892620000,

%U 295799727163686817428226118102222383709995755000,2462059619716250949213618993808700317296159580533060054282240

%N Number of 7*n X 7 0..2 arrays with row sums 3 and column sums 3*n

%H R. H. Hardin, <a href="/A172713/b172713.txt">Table of n, a(n) for n=1..12</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2010