836546domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.at n=6A251254Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.at n=3A251257