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| n | a(n) |
|---|---|
| 1 | 120 |
| 2 | 2 |
| 3 | 3 |
| 4 | 317 |
| 5 | 6240 |
| 6 | 69265 |
| 7 | 663855 |
| 8 | 12954512 |
| 9 | 466131976 |
| 10 | 13687472182 |
| 11 | 278976573772 |
[120,2,3,317,6240,69265,663855,12954512,466131976, 13687472182,278976573772] |