3265612528domain: NAppears in sequencesNumber of (n+1)X(5+1) 0..1 arrays with every 2X2 subblock having one or two 1s.at n=6A251323Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having one or two 1s.at n=4A251325