Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock having two distinct values, and new values 0..3 introduced in row major order.

A209808

Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock having two distinct values, and new values 0..3 introduced in row major order.

Terms

    a(0) =34a(1) =302a(2) =2721a(3) =25505a(4) =244208a(5) =2377378a(6) =23398105a(7) =231987361a(8) =2311229272a(9) =23098641162a(10) =231319042937

External references