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Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 8.
0

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

%S 1,4,18,138,3910,446508,89959563,25250999564,10095521906313,

%T 5572579847718200,4311704697906480578

%N Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 8.

%K nonn

%O 2,2

%A _R. H. Hardin_ Feb 09 2009