1799496100domain: NAppears in sequencesNumber of nX3 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.at n=6A207353Number of nX7 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.at n=2A207357