63575161960domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=6A251375Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=1A251380