42093682560domain: NAppears in sequencesNumber of (n+1)X3 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.at n=6A185800Number of (n+1) X 8 0..3 arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.at n=1A185805