A156513 - OEIS

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A156513

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 50.

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

%S 3,4,174,272,48562,360468,211236822,5909410784,14595969900224

%N Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 50.

%K nonn

%O 2,1

%A _R. H. Hardin_ Feb 09 2009