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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 60 |
| 6 | 20 |
| 7 | 140 |
| 8 | 280 |
| 9 | 2520 |
| 10 | 2520 |
| 11 | 27720 |
| 12 | 27720 |
| 13 | 360360 |
| 14 | 360360 |
| 15 | 360360 |
| 16 | 720720 |
| 17 | 12252240 |
| 18 | 4084080 |
| 19 | 77597520 |
| 20 | 15519504 |
| 21 | 5173168 |
| 22 | 5173168 |
| 23 | 118982864 |
| 24 | 356948592 |
| 25 | 8923714800 |
| 26 | 8923714800 |
| 27 | 80313433200 |
| 28 | 80313433200 |
| 29 | 2329089562800 |
| 30 | 2329089562800 |
| 31 | 72201776446800 |
[1,2,6,12,60,20,140,280,2520,2520,27720,27720, 360360,360360,360360,720720,12252240,4084080, 77597520,15519504,5173168,5173168,118982864, 356948592,8923714800,8923714800,80313433200, 80313433200,2329089562800,2329089562800, 72201776446800] |