The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 7 |
| 7 | 9 |
| 8 | 12 |
| 9 | 14 |
| 10 | 18 |
| 11 | 21 |
| 12 | 28 |
| 13 | 36 |
| 14 | 42 |
| 15 | 63 |
| 16 | 84 |
| 17 | 126 |
| 18 | 252 |
[1,2,3,4,6,7,9,12,14,18,21,28,36,42,63,84,126,252] |