18440768745domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with the maximum minus the lower median of every 2X2 subblock equal.at n=4A237846Number of (n+1) X (5+1) 0..2 arrays with the maximum minus the lower median of every 2 X 2 subblock equal.at n=3A237847