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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 17 |
| 4 | 29 |
| 5 | 199 |
| 6 | 521 |
| 7 | 3571 |
| 8 | 9349 |
| 9 | 103681 |
| 10 | 3010349 |
| 11 | 54018521 |
| 12 | 370248451 |
| 13 | 6643838879 |
| 14 | 10749957121 |
| 15 | 119218851371 |
| 16 | 5600748293801 |
| 17 | 688846502588399 |
| 18 | 32361122672259149 |
| 19 | 115561578124838522881 |
| 20 | 412670427844921037470771 |
[2,11,17,29,199,521,3571,9349,103681,3010349, 54018521,370248451,6643838879,10749957121, 119218851371,5600748293801,688846502588399, 32361122672259149,115561578124838522881, 412670427844921037470771] |