877968487domain: NAppears in sequencesNumber of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.at n=5A232291Number of 6Xn 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally.at n=3A232300