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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 97 |
| 5 | 937 |
| 6 | 29849 |
| 7 | 1721319 |
| 8 | 178547832 |
| 9 | 41247350230 |
| 10 | 17968646792801 |
[1,3,8,97,937,29849,1721319,178547832,41247350230, 17968646792801] |