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

A155221

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

Terms

    a(0) =1a(1) =7a(2) =25a(3) =70a(4) =500a(5) =7410a(6) =81126a(7) =1254921a(8) =35099024a(9) =1318005942a(10) =58686994598

External references