Research Article
Infinitely Many Trees with Maximum Number of Holes Zero, One, and Two
Table 1
Trees connectable to a vertex
colored
in a two-hole tree with 1 and 3 as holes.
| Color of vertex | Connectable trees | Condition |
| | | | | and all colors greater than less than adjacent to . | | | | | | | | |
| | | and all colors less than adjacent to . | | and all colors less than adjacent to . | | | | | | | | | | |
| c> | | | | and all colors greater than less than adjacent to . | | | | | | | | | | and | | and |
|
|