Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 40.

A156504

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 40.

Terms

    a(0) =2a(1) =0a(2) =32a(3) =114a(4) =16570a(5) =196824a(6) =116949508a(7) =3753914276

External references