570818506domain: NAppears in sequencesNumber of (n+1) X (3+1) 0..2 arrays colored with the difference of the upper median and the lower median in each 2 X 2 subblock.at n=6A236030Number of (n+1)X(7+1) 0..2 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock.at n=2A236034