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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 12 |
| 3 | 20 |
| 4 | 220 |
| 5 | 144 |
| 6 | 240 |
| 7 | 5060 |
| 8 | 5520 |
| 9 | 5520 |
| 10 | 10800 |
| 11 | 11520 |
| 12 | 8928 |
| 13 | 15120 |
| 14 | 31680 |
| 15 | 33984 |
| 16 | 56576 |
| 17 | 60372 |
| 18 | 39168 |
| 19 | 65280 |
| 20 | 80640 |
| 21 | 149760 |
| 22 | 149760 |
| 23 | 169920 |
| 24 | 281600 |
| 25 | 398200 |
| 26 | 664092 |
| 27 | 669600 |
| 28 | 940896 |
| 29 | 1235520 |
[1,3,12,20,220,144,240,5060,5520,5520,10800,11520, 8928,15120,31680,33984,56576,60372,39168,65280, 80640,149760,149760,169920,281600,398200,664092, 669600,940896,1235520] |