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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 37 |
| 8 | 892 |
| 9 | 18102 |
| 10 | 339301 |
| 11 | 6139802 |
| 12 | 109872694 |
| 13 | 1972283277 |
| 14 | 35832835698 |
| 15 | 662855671963 |
[1,37,892,18102,339301,6139802,109872694, 1972283277,35832835698,662855671963] |