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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 9 |
| 9 | 11 |
| 10 | 13 |
| 11 | 17 |
| 12 | 19 |
| 13 | 23 |
| 14 | 31 |
| 15 | 61 |
| 16 | 101 |
| 17 | 127 |
| 18 | 167 |
| 19 | 199 |
| 20 | 347 |
[1,2,3,4,5,6,7,9,11,13,17,19,23,31,61,101,127,167, 199,347] |