%I #4 Dec 18 2015 18:17:17
%S 4,7,78,660,19896,352350,29182380,1150637340,215977376730
%N Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 20.
%K nonn
%O 4,1
%A _R. H. Hardin_ Feb 09 2009