A156494 - OEIS

A156494

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 33.

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

%S 4,74,184,8852,37944,21579568,316294683,816922403024

%N Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 33.

%K nonn

%O 3,1

%A _R. H. Hardin_ Feb 09 2009