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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 3 |
| 7 | 21 |
| 8 | 168 |
| 9 | 1512 |
| 10 | 15120 |
| 11 | 166320 |
| 12 | 13860 |
| 13 | 180180 |
| 14 | 12870 |
| 15 | 858 |
| 16 | 13728 |
| 17 | 233376 |
| 18 | 4200768 |
| 19 | 79814592 |
| 20 | 1596291840 |
| 21 | 7 |
| 22 | 154 |
| 23 | 3542 |
| 24 | 4 |
| 25 | 100 |
| 26 | 2600 |
| 27 | 70200 |
| 28 | 1965600 |
| 29 | 57002400 |
| 30 | 1900080 |
| 31 | 58902480 |
| 32 | 1884879360 |
| 33 | 62201018880 |
[1,2,6,24,120,3,21,168,1512,15120,166320,13860, 180180,12870,858,13728,233376,4200768,79814592, 1596291840,7,154,3542,4,100,2600,70200,1965600, 57002400,1900080,58902480,1884879360,62201018880] |