17309672domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=2A251376T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=12A251381