1/6 of the number of ways of 3-coloring an (n-1) X n grid.

A078101

1/6 of the number of ways of 3-coloring an (n-1) X n grid.

Terms

    a(0) =1a(1) =9a(2) =187a(3) =9075a(4) =1034073a(5) =277458045a(6) =175605187731

External references