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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 60 |
| 6 | 60 |
| 7 | 420 |
| 8 | 840 |
| 9 | 2520 |
| 10 | 2520 |
| 11 | 27720 |
| 12 | 13860 |
| 13 | 180180 |
| 14 | 360360 |
| 15 | 360360 |
| 16 | 720720 |
| 17 | 12252240 |
| 18 | 4084080 |
| 19 | 77597520 |
| 20 | 38798760 |
| 21 | 116396280 |
| 22 | 232792560 |
| 23 | 5354228880 |
| 24 | 1338557220 |
| 25 | 6692786100 |
| 26 | 13385572200 |
| 27 | 40156716600 |
| 28 | 80313433200 |
[1,1,2,6,12,60,60,420,840,2520,2520,27720,13860, 180180,360360,360360,720720,12252240,4084080, 77597520,38798760,116396280,232792560,5354228880, 1338557220,6692786100,13385572200,40156716600, 80313433200] |