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

A155257

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

Terms

    a(0) =1a(1) =4a(2) =13a(3) =28a(4) =111a(5) =502a(6) =2990a(7) =22461a(8) =175998a(9) =1776694a(10) =23271927a(11) =358397754a(12) =6862062854a(13) =158641875413

External references