413630526506domain: NAppears in sequencesNumber of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=2A251800Number of (3+1)X(n+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=6A251803