5254828598domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal.at n=4A236976Number of (n+1)X(5+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal.at n=3A236977