66591domain: NAppears in sequencesa(2*n+1) = 9*a(n), a(2*n+2) = 10*a(n) + a(n-1).at n=33A116555Number of (n+1) X 7 0..2 arrays with all 2 X 2 subblock sums the same.at n=6A184000Number of (n+1) X 8 0..2 arrays with all 2 X 2 subblock sums the same.at n=5A184001