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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 39 |
| 4 | 314 |
| 5 | 3359 |
| 6 | 45000 |
| 7 | 725269 |
| 8 | 13670256 |
| 9 | 295099184 |
| 10 | 7179749707 |
| 11 | 194399095705 |
| 12 | 5797793490859 |
| 13 | 188855813757729 |
| 14 | 6671188010874785 |
| 15 | 254007814638737649 |
| 16 | 10370334196814589256 |
| 17 | 451923738493729293016 |
| 18 | 20937747226064522726151 |
| 19 | 1027666505638118490940059 |
[1,2,7,39,314,3359,45000,725269,13670256, 295099184,7179749707,194399095705,5797793490859, 188855813757729,6671188010874785, 254007814638737649,10370334196814589256, 451923738493729293016,20937747226064522726151, 1027666505638118490940059] |