The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #4 Dec 18 2015 18:17:18
%S 4656,48248,254088,939936,4708356,18184688,61848084,284320904,
%T 1123134900,4166675112
%N Number of n X n arrays of squares of integers with every 3X3 subblock summing to 18
%K nonn
%O 3,1
%A _R. H. Hardin_ Apr 06 2009