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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 3 |
| 14 | 10 |
| 15 | 16 |
| 16 | 53 |
| 17 | 553 |
| 18 | 14536 |
[1,1,1,1,1,1,1,2,2,2,2,2,3,10,16,53,553,14536] |