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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 9 |
| 7 | 12 |
| 8 | 18 |
| 9 | 23 |
| 10 | 36 |
| 11 | 46 |
| 12 | 69 |
| 13 | 92 |
| 14 | 138 |
| 15 | 207 |
| 16 | 276 |
| 17 | 414 |
| 18 | 828 |
[1,2,3,4,6,9,12,18,23,36,46,69,92,138,207,276,414, 828] |