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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 13 |
| 4 | 17 |
| 5 | 21 |
| 6 | 29 |
| 7 | 33 |
| 8 | 37 |
| 9 | 41 |
| 10 | 49 |
| 11 | 53 |
| 12 | 57 |
| 13 | 61 |
| 14 | 69 |
| 15 | 73 |
| 16 | 77 |
| 17 | 81 |
| 18 | 89 |
| 19 | 93 |
| 20 | 97 |
[1,9,13,17,21,29,33,37,41,49,53,57,61,69,73,77,81, 89,93,97] |