Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 15.

A156462

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 15.

Terms

    a(0) =22a(1) =0a(2) =3200a(3) =2952a(4) =1651208a(5) =6328576a(6) =2727888448a(7) =31390349120

External references