3917422192domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal.at n=4A237207Number of (n+1)X(5+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal.at n=3A237208