Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

A185836

Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

Terms

    a(0) =0a(1) =1773a(2) =424197a(3) =560733777

External references