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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 6 |
| 5 | 36 |
| 6 | 108 |
| 7 | 3888 |
| 8 | 23328 |
| 9 | 90699264 |
| 10 | 9795520512 |
| 11 | 888446500935303168 |
| 12 | 20725679973818752303104 |
| 13 | 18413657852244156256526524022900467433472 |
| 14 | 180371363192607497842938699938382286478962971377664 |
[1,2,3,6,6,36,108,3888,23328,90699264,9795520512, 888446500935303168,20725679973818752303104, 18413657852244156256526524022900467433472, 18037136319260749784293869993838228647896297137766\ 4] |