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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 8 |
| 7 | 18 |
| 8 | 30 |
| 9 | 95 |
| 10 | 165 |
| 11 | 805 |
| 12 | 2738 |
| 13 | 3038 |
| 14 | 5953 |
| 15 | 6009 |
| 16 | 7205 |
| 17 | 9631 |
| 18 | 17495 |
| 19 | 27745 |
| 20 | 28449 |
| 21 | 62278 |
| 22 | 106516 |
| 23 | 130825 |
| 24 | 153664 |
[1,2,3,4,5,8,18,30,95,165,805,2738,3038,5953,6009, 7205,9631,17495,27745,28449,62278,106516,130825, 153664] |