Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 2,1 3,0 4,0 polyhexes in any orientation on a planar nXnXn triangular grid.
A155271
Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 2,1 3,0 4,0 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =7a(2) =25a(3) =105a(4) =639a(5) =3603a(6) =22857a(7) =241966a(8) =2928219a(9) =43585143a(10) =850752020a(11) =19021431704a(12) =530984535190
External references
- oeis: A155271