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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 13 |
| 3 | 21 |
| 4 | 47 |
| 5 | 59 |
| 6 | 77 |
| 7 | 109 |
| 8 | 129 |
| 9 | 155 |
| 10 | 163 |
| 11 | 245 |
| 12 | 337 |
| 13 | 511 |
| 14 | 1417 |
| 15 | 3013 |
| 16 | 3757 |
| 17 | 4989 |
| 18 | 8977 |
| 19 | 12479 |
| 20 | 12869 |
[11,13,21,47,59,77,109,129,155,163,245,337,511, 1417,3013,3757,4989,8977,12479,12869] |