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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 1296 |
| 4 | 20736 |
| 5 | 12960000 |
| 6 | 4320000 |
| 7 | 10372320000 |
| 8 | 165957120000 |
| 9 | 40327580160000 |
| 10 | 8065516032000 |
| 11 | 118087220224512000 |
| 12 | 118087220224512000 |
| 13 | 3372689096832287232000 |
| 14 | 3372689096832287232000 |
| 15 | 16863445484161436160000 |
| 16 | 269815127746582978560000 |
| 17 | 22535229284522356952309760000 |
[1,16,1296,20736,12960000,4320000,10372320000, 165957120000,40327580160000,8065516032000, 118087220224512000,118087220224512000, 3372689096832287232000,3372689096832287232000, 16863445484161436160000,269815127746582978560000, 22535229284522356952309760000] |