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| n | a(n) |
|---|---|
| 1 | 99 |
| 2 | 53291 |
| 3 | 30470039 |
| 4 | 17788952657 |
| 5 | 10441043545431 |
| 6 | 6137910765383119 |
| 7 | 3609497709468161601 |
[99,53291,30470039,17788952657,10441043545431, 6137910765383119,3609497709468161601] |