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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 30 |
| 5 | 24 |
| 6 | 168 |
| 7 | 288 |
| 8 | 1080 |
| 9 | 1920 |
| 10 | 12672 |
| 11 | 8640 |
| 12 | 131040 |
| 13 | 161280 |
| 14 | 414720 |
| 15 | 774144 |
| 16 | 10575360 |
| 17 | 8294400 |
| 18 | 36771840 |
| 19 | 69672960 |
| 20 | 383201280 |
| 21 | 729907200 |
| 22 | 4578508800 |
| 23 | 2043740160 |
| 24 | 45287424000 |
| 25 | 65213890560 |
| 26 | 180592312320 |
| 27 | 347807416320 |
[1,3,4,30,24,168,288,1080,1920,12672,8640,131040, 161280,414720,774144,10575360,8294400,36771840, 69672960,383201280,729907200,4578508800, 2043740160,45287424000,65213890560,180592312320, 347807416320] |