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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 140 |
| 3 | 2347 |
| 4 | 109477 |
| 5 | 21391089 |
| 6 | 14299793331 |
| 7 | 30535534087125 |
| 8 | 199765892340671739 |
[6,140,2347,109477,21391089,14299793331, 30535534087125,199765892340671739] |