Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,2 5,3 polyhexes in any orientation on a planar n X n X n triangular grid.
A155336
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,2 5,3 polyhexes in any orientation on a planar n X n X n triangular grid.
Terms
- a(0) =1a(1) =7a(2) =19a(3) =43a(4) =112a(5) =333a(6) =1722a(7) =11278a(8) =66471a(9) =421203a(10) =3100169a(11) =28603780a(12) =333898461a(13) =4399044128a(14) =64174608851
External references
- oeis: A155336