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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 21 |
| 7 | 49 |
| 8 | 265 |
| 9 | 1337 |
| 10 | 7025 |
| 11 | 55305 |
| 12 | 543439 |
| 13 | 6271235 |
| 14 | 94294061 |
| 15 | 1709408045 |
| 16 | 38060613237 |
[1,1,1,1,5,21,49,265,1337,7025,55305,543439, 6271235,94294061,1709408045,38060613237] |