2062530658domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=4A251061Number of (5+1)X(n+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=3A251069