Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
A155242
Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =7a(2) =19a(3) =70a(4) =235a(5) =1578a(6) =9621a(7) =89416a(8) =823589a(9) =11073433a(10) =160764354a(11) =3227749885a(12) =73045396627
External references
- oeis: A155242