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Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 5.
0

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

%S 2,6,42,291,2962,44124,2078160,253938600,45965640312,10615656460584,

%T 3031205165103456,1051966701961097184

%N Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 5.

%K nonn

%O 2,1

%A _R. H. Hardin_ Feb 09 2009