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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 11 |
| 5 | 21 |
| 6 | 27 |
| 7 | 43 |
| 8 | 51 |
| 9 | 69 |
| 10 | 83 |
| 11 | 111 |
| 12 | 123 |
| 13 | 157 |
| 14 | 171 |
| 15 | 199 |
| 16 | 227 |
| 17 | 273 |
[1,3,7,11,21,27,43,51,69,83,111,123,157,171,199, 227,273] |