Number of (n+2) X (n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2, 3, 6, or 7.

A251783

Number of (n+2) X (n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2, 3, 6, or 7.

Terms

    a(0) =1280a(1) =2640a(2) =16710a(3) =149364a(4) =2432344a(5) =52977162a(6) =2223220200a(7) =171503981892

External references