Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or more.
A251856
Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or more.
Terms
- a(0) =245388a(1) =10413561a(2) =486474024a(3) =20861600041a(4) =909671877740
External references
- oeis: A251856