Number of (n+1)X9 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

A187139

Number of (n+1)X9 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

Terms

    a(0) =1731321a(1) =1908891288a(2) =658156407930

External references