Number of (n+1)X3 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

A187133

Number of (n+1)X3 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

Terms

    a(0) =171a(1) =1773a(2) =19062a(3) =182214a(4) =1853892a(5) =18740754a(6) =189091422a(7) =1908891288a(8) =19278208206a(9) =194645680218

External references