71747464domain: NAppears in sequencesNumber of (n+1)X(1+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=6A237069Number of (n+1)X(7+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=0A237075T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median of every 2X2 subblock equal.at n=21A237076