Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,1 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.

A155266

Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,1 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.

Terms

    a(0) =1a(1) =4a(2) =13a(3) =28a(4) =70a(5) =418a(6) =3187a(7) =20380a(8) =144781a(9) =1561781a(10) =23475489a(11) =388651137a(12) =7313541265a(13) =177385458253

External references