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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 5 |
| 6 | 10 |
| 7 | 23 |
| 8 | 102 |
| 9 | 102 |
| 10 | 138 |
| 11 | 451 |
| 12 | 1922 |
| 13 | 1624 |
| 14 | 5630 |
| 15 | 26410 |
[1,1,2,4,5,10,23,102,102,138,451,1922,1624,5630, 26410] |