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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 24 |
| 4 | 28 |
| 5 | 120 |
| 6 | 496 |
| 7 | 672 |
| 8 | 2016 |
| 9 | 4320 |
| 10 | 4680 |
| 11 | 8128 |
| 12 | 8190 |
| 13 | 26208 |
| 14 | 30240 |
| 15 | 32760 |
| 16 | 42336 |
| 17 | 45864 |
| 18 | 392448 |
| 19 | 523776 |
| 20 | 714240 |
| 21 | 1571328 |
| 22 | 2178540 |
| 23 | 8910720 |
| 24 | 17428320 |
| 25 | 20427264 |
| 26 | 23569920 |
| 27 | 29795040 |
| 28 | 33550336 |
| 29 | 34369920 |
| 30 | 45532800 |
| 31 | 61900800 |
[1,6,24,28,120,496,672,2016,4320,4680,8128,8190, 26208,30240,32760,42336,45864,392448,523776, 714240,1571328,2178540,8910720,17428320,20427264, 23569920,29795040,33550336,34369920,45532800, 61900800] |