> phh("hex", 4L, nrow = 9, ncol = 9)
/------------------\
| 1 2 1 2 1 2 1 2 1|
|4 3 4 3 4 3 4 3 4 |
| 2 1 2 1 2 1 2 1 2|
|3 4 3 4 3 4 3 4 3 |
| 1 2 1 2 1 2 1 2 1|
|4 3 4 3 4 3 4 3 4 |
| 2 1 2 1 2 1 2 1 2|
|3 4 3 4 3 4 3 4 3 |
| 1 2 1 2 1 2 1 2 1|
\------------------/

