181155460364domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..3 arrays with the upper median equal to the lower median in every 2X2 subblock.at n=4A235853Number of (n+1)X(5+1) 0..3 arrays with the upper median equal to the lower median in every 2X2 subblock.at n=3A235854