A172748 - OEIS

%I #3 Mar 31 2012 12:35:41

%S 1,3,55,8515,13130451,210668680701,36012988082548233,

%T 68307608848277646753795,1469748355306450464225368161315,

%U 364459290339560650671344361875961740353

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 06 2010