11899510847domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock equal.at n=5A237103Number of (n+1)X(6+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock equal.at n=2A237106