12551185804domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=5A237070Number of (n+1)X(6+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=1A237074T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=22A237076