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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 31 |
| 4 | 823 |
| 5 | 8359081 |
| 6 | 838645835501 |
| 7 | 3454952325449641 |
| 8 | 39037487994583246494995203209075812905781919221 |
| 9 | 3849036379333595071904298941172131921008511669448798002135139108572992781805641 |
[2,7,31,823,8359081,838645835501,3454952325449641, 39037487994583246494995203209075812905781919221, 38490363793335950719042989411721319210085116694487\ 98002135139108572992781805641] |