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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 8 |
| 7 | 9 |
| 8 | 12 |
| 9 | 18 |
| 10 | 24 |
| 11 | 27 |
| 12 | 36 |
| 13 | 54 |
| 14 | 72 |
| 15 | 81 |
| 16 | 108 |
| 17 | 162 |
| 18 | 216 |
| 19 | 324 |
| 20 | 648 |
[1,2,3,4,6,8,9,12,18,24,27,36,54,72,81,108,162, 216,324,648] |