21527380domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..2 arrays colored with the maximum plus the minimum minus the lower median of every 2X2 subblock.at n=3A237179T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the minimum minus the lower median of every 2X2 subblock.at n=24A237182