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%I #4 Dec 18 2015 18:17:17
%S 2,12,180,6058,2130020,3614728470,37525899871744,1411771686417771108
%N Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 53.
%K nonn
%O 2,1
%A _R. H. Hardin_ Feb 09 2009