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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 13 |
| 3 | 59 |
| 4 | 311 |
| 5 | 337 |
| 6 | 769 |
| 7 | 3137 |
| 8 | 3389 |
| 9 | 9631 |
| 10 | 46691 |
| 11 | 49783 |
| 12 | 49789 |
| 13 | 139969 |
| 14 | 143093 |
| 15 | 823601 |
| 16 | 826673 |
| 17 | 826699 |
| 18 | 870253 |
| 19 | 916859 |
| 20 | 16777729 |
| 21 | 16780369 |
| 22 | 16780601 |
| 23 | 16823903 |
| 24 | 16827001 |
| 25 | 17600761 |
| 26 | 17600813 |
| 27 | 18427427 |
| 28 | 33557561 |
| 29 | 33604213 |
| 30 | 34378231 |
[7,13,59,311,337,769,3137,3389,9631,46691,49783, 49789,139969,143093,823601,826673,826699,870253, 916859,16777729,16780369,16780601,16823903, 16827001,17600761,17600813,18427427,33557561, 33604213,34378231] |