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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 18 |
| 5 | 22 |
| 6 | 32 |
| 7 | 46 |
| 8 | 58 |
| 9 | 77 |
| 10 | 97 |
| 11 | 114 |
| 12 | 135 |
| 13 | 160 |
| 14 | 186 |
| 15 | 218 |
| 16 | 238 |
| 17 | 279 |
| 18 | 312 |
| 19 | 349 |
[3,6,9,18,22,32,46,58,77,97,114,135,160,186,218, 238,279,312,349] |