1401453domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=2A251346T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=12A251351