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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 3 |
| 4 | 192 |
| 5 | 960 |
| 6 | 1920 |
| 7 | 1680 |
| 8 | 215040 |
| 9 | 645120 |
| 10 | 64512 |
| 11 | 1419264 |
| 12 | 11354112 |
| 13 | 147603456 |
| 14 | 295206912 |
| 15 | 46126080 |
| 16 | 47233105920 |
| 17 | 802962800640 |
| 18 | 802962800640 |
| 19 | 15256293212160 |
| 20 | 61025172848640 |
| 21 | 61025172848640 |
| 22 | 122050345697280 |
[2,8,3,192,960,1920,1680,215040,645120,64512, 1419264,11354112,147603456,295206912,46126080, 47233105920,802962800640,802962800640, 15256293212160,61025172848640,61025172848640, 122050345697280] |