268073808domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal.at n=6A237205Number of (n+1)X(7+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal.at n=1A237210