The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 2 |
| 18 | 3 |
| 19 | 3 |
| 20 | 5 |
| 21 | 5 |
| 22 | 6 |
| 23 | 6 |
| 24 | 9 |
| 25 | 10 |
| 26 | 13 |
| 27 | 15 |
| 28 | 19 |
[1,1,1,1,1,1,2,2,2,2,3,3,5,5,6,6,9,10,13,15,19] |