39940889449domain: NAppears in sequencesNumber of nX3 0..3 arrays avoiding the pattern z-2 z-1 z in any row or column.at n=5A207285Number of nX6 0..3 arrays avoiding the pattern z-2 z-1 z in any row or column.at n=2A207288T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z-2 z-1 z in any row or column.at n=30A207290