Number of (n+2) X (n+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4.

A252057

Number of (n+2) X (n+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4.

Terms

    a(0) =125a(1) =346a(2) =2349a(3) =30182a(4) =664938a(5) =23078709a(6) =1229012088a(7) =100756110010

External references