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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 6 |
| 4 | 60 |
| 5 | 480 |
| 6 | 60 |
| 7 | 450 |
| 8 | 17520 |
| 9 | 17520 |
| 10 | 450 |
| 11 | 3000 |
| 12 | 524160 |
| 13 | 2624640 |
| 14 | 524160 |
| 15 | 3000 |
| 16 | 18750 |
| 17 | 14288400 |
| 18 | 326697720 |
| 19 | 326697720 |
| 20 | 14288400 |
| 21 | 18750 |
| 22 | 112500 |
| 23 | 368958240 |
| 24 | 37212131520 |
| 25 | 170119348800 |
| 26 | 37212131520 |
| 27 | 368958240 |
| 28 | 112500 |
| 29 | 656250 |
| 30 | 9195061680 |
[0,6,6,60,480,60,450,17520,17520,450,3000,524160, 2624640,524160,3000,18750,14288400,326697720, 326697720,14288400,18750,112500,368958240, 37212131520,170119348800,37212131520,368958240, 112500,656250,9195061680] |