880923796domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock equal.at n=3A237003T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the upper median plus the lower median of every 2 X 2 subblock equal.at n=24A237007