Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.
A207204
Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.
Terms
- a(0) =69a(1) =4761a(2) =192640a(3) =7766709a(4) =309262926a(5) =12412097426a(6) =500670359576
External references
- oeis: A207204