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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 12 |
| 3 | 198 |
| 4 | 240 |
| 5 | 264 |
| 6 | 270 |
| 7 | 396 |
| 8 | 540 |
| 9 | 6720 |
| 10 | 7920 |
| 11 | 11880 |
| 12 | 13770 |
| 13 | 27540 |
| 14 | 221760 |
| 15 | 337440 |
| 16 | 605880 |
| 17 | 2500344 |
| 18 | 6072570 |
| 19 | 11135520 |
| 20 | 12145140 |
| 21 | 267193080 |
| 22 | 441692160 |
| 23 | 1112629770 |
| 24 | 2225259540 |
| 25 | 14575841280 |
| 26 | 48955709880 |
[6,12,198,240,264,270,396,540,6720,7920,11880, 13770,27540,221760,337440,605880,2500344,6072570, 11135520,12145140,267193080,441692160,1112629770, 2225259540,14575841280,48955709880] |