135945364domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock.at n=4A236031Number of (n+1)X(5+1) 0..2 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock.at n=3A236032