A172883 - OEIS

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

%S 0,580,61236085104,889348003628262655840,

%T 747407928835934560435386462917600,

%U 20140279098377603754458043886598358319686833280

%N Number of 3*n X n 0..5 arrays with row sums 7 and column sums 21

%H R. H. Hardin, <a href="/A172883/b172883.txt">Table of n, a(n) for n=1..10</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 06 2010