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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 9 |
| 7 | 11 |
| 8 | 12 |
| 9 | 18 |
| 10 | 22 |
| 11 | 33 |
| 12 | 36 |
| 13 | 44 |
| 14 | 66 |
| 15 | 99 |
| 16 | 132 |
| 17 | 198 |
| 18 | 396 |
[1,2,3,4,6,9,11,12,18,22,33,36,44,66,99,132,198, 396] |