1981367324domain: NAppears in sequencesNumber of n X n 0..3 arrays avoiding the pattern z z+1 z in any row or column.at n=3A207128Number of nX4 0..3 arrays avoiding the pattern z z+1 z in any row or column.at n=3A207130T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z z+1 z in any row or column.at n=24A207134