19305898426domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal.at n=6A237206Number 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=2A237210