390348614698domain: NAppears in sequencesNumber of (n+2) X 3 binary arrays avoiding patterns 001 and 100 in rows and columns.at n=17A202310Number of n X 3 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.at n=19A207437