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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 59 |
| 5 | 758 |
| 6 | 16589 |
| 7 | 691050 |
| 8 | 49864703 |
| 9 | 6407474303 |
| 10 | 1486385754054 |
[1,2,8,59,758,16589,691050,49864703,6407474303, 1486385754054] |