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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 48 |
| 3 | 180 |
| 4 | 480 |
| 5 | 2016 |
| 6 | 3528 |
| 7 | 5760 |
| 8 | 13200 |
| 9 | 26208 |
| 10 | 61200 |
| 11 | 78336 |
| 12 | 123120 |
| 13 | 267168 |
| 14 | 374400 |
| 15 | 511056 |
| 16 | 682080 |
| 17 | 892800 |
| 18 | 1014816 |
| 19 | 1822176 |
| 20 | 2755200 |
| 21 | 3337488 |
| 22 | 4773696 |
| 23 | 5644800 |
| 24 | 7738848 |
| 25 | 11908560 |
| 26 | 13615200 |
| 27 | 16511040 |
| 28 | 19845936 |
| 29 | 25048800 |
| 30 | 28003968 |
[6,48,180,480,2016,3528,5760,13200,26208,61200, 78336,123120,267168,374400,511056,682080,892800, 1014816,1822176,2755200,3337488,4773696,5644800, 7738848,11908560,13615200,16511040,19845936, 25048800,28003968] |