30455338423domain: NAppears in sequencesNumber of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=5A251346Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock summing to 3 4 or 5.at n=2A251349