> phh("hex", 7L, nrow = 9, ncol = 9)
/------------------\
| 2 3 4 5 6 7 1 2 3|
|4 5 6 7 1 2 3 4 5 |
| 7 1 2 3 4 5 6 7 1|
|2 3 4 5 6 7 1 2 3 |
| 5 6 7 1 2 3 4 5 6|
|7 1 2 3 4 5 6 7 1 |
| 3 4 5 6 7 1 2 3 4|
|5 6 7 1 2 3 4 5 6 |
| 1 2 3 4 5 6 7 1 2|
\------------------/

