449258domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock.at n=2A237680T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the upper median plus the lower median minus the minimum of every 2X2 subblock.at n=12A237683