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| n | a(n) |
|---|---|
| 2 | 7 |
| 3 | 97 |
| 4 | 349 |
| 5 | 13309 |
| 6 | 33613 |
| 7 | 5594749 |
| 8 | 84477247 |
| 9 | 1524981247 |
| 10 | 60924074749 |
[7,97,349,13309,33613,5594749,84477247,1524981247, 60924074749] |