| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 48 |
| 5 | 338 |
| 6 | 2112 |
| 7 | 27873 |
| 8 | 325940 |
| 9 | 7927215 |
| 10 | 173294023 |
| 11 | 7887044079 |
| 12 | 319688425834 |
| 13 | 27098632121268 |
| 14 | 2049789115719959 |
| 15 | 323784392678130807 |
| 16 | 45665932705751433387 |
| 17 | 13440450508552654148691 |
[1,2,4,16,48,338,2112,27873,325940,7927215, 173294023,7887044079,319688425834,27098632121268, 2049789115719959,323784392678130807, 45665932705751433387,13440450508552654148691] |