Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 12.

A156456

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 12.

Terms

    a(0) =1a(1) =12a(2) =12a(3) =926a(4) =3066a(5) =417378a(6) =4260776a(7) =624439948a(8) =10607876660

External references