1151715397domain: NAppears in sequencesNumber of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.at n=4A251339Number of (n+1)X(5+1) 0..3 arrays with every 2X2 subblock summing to a nonzero multiple of 3.at n=3A251340