Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,0 3,1 polyhexes in any orientation on a planar nXnXn triangular grid.
A155231
Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,0 3,1 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =7a(2) =25a(3) =55a(4) =259a(5) =2433a(6) =26055a(7) =255284a(8) =3429704a(9) =71355614a(10) =1963935839a(11) =63893300754
External references
- oeis: A155231