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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 24 |
| 6 | 144 |
| 7 | 1008 |
| 8 | 8064 |
| 9 | 8064 |
| 10 | 80640 |
| 11 | 887040 |
| 12 | 10644480 |
| 13 | 10644480 |
| 14 | 149022720 |
| 15 | 2235340800 |
| 16 | 35765452800 |
| 17 | 35765452800 |
| 18 | 643778150400 |
| 19 | 12231784857600 |
| 20 | 244635697152000 |
| 21 | 244635697152000 |
| 22 | 5381985337344000 |
| 23 | 123785662758912000 |
| 24 | 2970855906213888000 |
[1,2,6,24,24,144,1008,8064,8064,80640,887040, 10644480,10644480,149022720,2235340800, 35765452800,35765452800,643778150400, 12231784857600,244635697152000,244635697152000, 5381985337344000,123785662758912000, 2970855906213888000] |