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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 31 |
| 4 | 709 |
| 5 | 9737333 |
| 6 | 3657500101 |
| 7 | 2586559730396077 |
| 8 | 4123221751654370051 |
| 9 | 28785866289100396890228041 |
[3,5,31,709,9737333,3657500101,2586559730396077, 4123221751654370051,28785866289100396890228041] |