26513929449domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock.at n=5A235977Number of (n+1)X(6+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock.at n=3A235979