Number of (n+1)X3 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

A185838

Number of (n+1)X3 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace.

Terms

    a(0) =171a(1) =1773a(2) =20097a(3) =222003a(4) =2506851a(5) =28276065a(6) =319126401a(7) =3601102725a(8) =40637462859a(9) =458593005339

External references