402944837domain: NAppears in sequencesNumber of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=6A236315T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=21A236319