Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

A185839

Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

Terms

    a(0) =405a(1) =20097a(2) =424197a(3) =10670517a(4) =254648349a(5) =6182861913a(6) =149296412943

External references