Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
A206859
Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
Terms
- a(0) =69a(1) =4761a(2) =192575a(3) =7598355a(4) =314918295a(5) =13093461017a(6) =541018725304
External references
- oeis: A206859