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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 24 |
| 6 | 37 |
| 7 | 53 |
| 8 | 63 |
| 9 | 84 |
| 10 | 299 |
| 11 | 506 |
| 12 | 1687 |
| 13 | 6660 |
| 14 | 7473 |
| 15 | 8754 |
| 16 | 24048 |
| 17 | 68078 |
| 18 | 71223 |
[1,2,3,5,24,37,53,63,84,299,506,1687,6660,7473, 8754,24048,68078,71223] |