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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 37 |
| 8 | 894 |
| 9 | 18206 |
| 10 | 342569 |
| 11 | 6221041 |
| 12 | 111642123 |
| 13 | 2007816930 |
| 14 | 36510158201 |
[1,37,894,18206,342569,6221041,111642123, 2007816930,36510158201] |