%I #5 Jun 16 2015 14:16:30
%S 0,1,1640,123744,1546356,9282128,37896264,121782952,331901924,
%T 801191922,1761200680,3592793804,6894127812,12569395174
%N Number of n X n arrays of squares of integers summing to 9 with every element equal to at least one neighbor.
%K nonn
%O 2,3
%A _R. H. Hardin_, Apr 14 2009