139048718681domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=4A251347Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=3A251348