32887826domain: NAppears in sequencesNumber of (n+1) X 4 binary arrays with each element of every 2 X 2 subblock being the sum mod 2 of two others.at n=7A183839Number of (n+1) X 9 binary arrays with each element of every 2 X 2 subblock being the sum mod 2 of two others.at n=2A183844