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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 127 |
| 4 | 4089 |
| 5 | 282773 |
| 6 | 49760703 |
| 7 | 20707472573 |
| 8 | 20600904514660 |
| 9 | 49733650804666451 |
| 10 | 286285861465088790415 |
| 11 | 3974820937067425803238060 |
| 12 | 132436400028311259382055434539 |
| 13 | 10601199973430473477383046531697322 |
[2,11,127,4089,282773,49760703,20707472573, 20600904514660,49733650804666451, 286285861465088790415,3974820937067425803238060, 132436400028311259382055434539, 10601199973430473477383046531697322] |