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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 6 |
| 5 | 30 |
| 6 | 5 |
| 7 | 35 |
| 8 | 140 |
| 9 | 1260 |
| 10 | 1260 |
| 11 | 13860 |
| 12 | 13860 |
| 13 | 180180 |
| 14 | 180180 |
| 15 | 180180 |
| 16 | 360360 |
| 17 | 6126120 |
| 18 | 2042040 |
| 19 | 38798760 |
| 20 | 7759752 |
| 21 | 2586584 |
| 22 | 2586584 |
| 23 | 59491432 |
| 24 | 178474296 |
| 25 | 4461857400 |
| 26 | 4461857400 |
| 27 | 40156716600 |
| 28 | 40156716600 |
| 29 | 1164544781400 |
| 30 | 1164544781400 |
[1,1,2,6,6,30,5,35,140,1260,1260,13860,13860, 180180,180180,180180,360360,6126120,2042040, 38798760,7759752,2586584,2586584,59491432, 178474296,4461857400,4461857400,40156716600, 40156716600,1164544781400,1164544781400] |