Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 11.

A156454

Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 11.

Terms

    a(0) =2a(1) =22a(2) =48a(3) =1568a(4) =9108a(5) =459944a(6) =3924896a(7) =332810880a(8) =3867308971a(9) =659368209568

External references