A156481 - OEIS

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A156481

Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 24.

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

%S 2,0,31,210,36876,568284,46154300,2932212900,1044426597950

%N Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 24.

%K nonn

%O 4,1

%A _R. H. Hardin_ Feb 09 2009