%I #4 Dec 18 2015 18:17:16
%S 1,4,0,18,90,5154,19368,2108280,31103100,3164432181,105602337600,
%T 14188463179758,817218706478195
%N Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 12.
%K nonn
%O 3,2
%A _R. H. Hardin_ Feb 09 2009
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