Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 73.

A156524

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 73.

Terms

    a(0) =2a(1) =2a(2) =102a(3) =194a(4) =52440a(5) =367472a(6) =1145093308a(7) =43695620566

External references