526362000253domain: NAppears in sequencesNumber of (n+1) X 3 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.at n=7A183741Number of (n+1) X 9 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.at n=1A183747