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| n | a(n) |
|---|---|
| 1 | 720 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 8 |
| 6 | 17 |
| 7 | 2033 |
| 8 | 279070 |
| 9 | 27767384 |
| 10 | 1883165721 |
| 11 | 86034010064 |
| 12 | 2749223521421 |
[720,2,3,3,8,17,2033,279070,27767384,1883165721, 86034010064,2749223521421] |