52300962414domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..3 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock equal.at n=5A237221Number of (n+1)X(6+1) 0..3 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock equal.at n=2A237224