With two-sided polypents, mirror images are identified. With one-sided polypents, mirror images are distinguished. In the diagrams below, I show only two-sided polypents.
Thanks to Mark Smith for suggesting this problem.
| Cells | Two-Sided | One-Sided |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 1 | 1 |
| 3 | 2 | 2 |
| 4 | 4 | 5 |
| 5 | 7 | 9 |
| 6 | 14 | 20 |
| 7 | 11 | 13 |
| 8 | 10 | 12 |
| 9 | 5 | 5 |
| 10 | 3 | 3 |
| 11 | 1 | 1 |
| 12 | 1 | 1 |
Last revised 2018-03-04.