%I #4 Dec 18 2015 18:17:17
%S 6,0,78,163,58704,590400,202480300,9256081380,4014312232560
%N Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28.
%K nonn
%O 4,1
%A _R. H. Hardin_ Feb 09 2009