43510308650domain: NAppears in sequencesNumber of (n+1)X(6+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=2A251799Number of (3+1)X(n+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=5A251803