Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 or 4.

A252335

Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 or 4.

Terms

    a(0) =52a(1) =268a(2) =2978a(3) =43708a(4) =960912a(5) =33579112a(6) =1793526072a(7) =147518483334

External references