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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 43 |
| 4 | 431 |
| 5 | 6466 |
| 6 | 135787 |
| 7 | 3802037 |
| 8 | 136873333 |
| 9 | 6159299986 |
| 10 | 338761499231 |
| 11 | 22358258949247 |
| 12 | 1743944198041267 |
| 13 | 158698922021755298 |
| 14 | 16663386812284306291 |
| 15 | 1999606417474116754921 |
| 16 | 271946472776479878669257 |
| 17 | 41607810334801421436396322 |
[1,2,7,43,431,6466,135787,3802037,136873333, 6159299986,338761499231,22358258949247, 1743944198041267,158698922021755298, 16663386812284306291,1999606417474116754921, 271946472776479878669257, 41607810334801421436396322] |