%I #4 Dec 18 2015 18:17:16

%S 1,2,4,11,57,1082,42354,2278938,154294582,12767337844,1267231350044,

%T 148617033979348,20331541618406216

%N Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 4.

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 09 2009