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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 36 |
| 4 | 2016 |
| 5 | 1493856 |
| 6 | 579616128 |
| 7 | 11013286048128 |
| 8 | 1004811205553955491328 |
| 9 | 1897191992473259952000123882626029056 |
| 10 | 5012064437680248664058937311304485563631765718940918773832320000 |
[1,3,6,36,2016,1493856,579616128,11013286048128, 1004811205553955491328, 1897191992473259952000123882626029056, 50120644376802486640589373113044855636317657189409\ 18773832320000] |