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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 8 |
| 4 | 60 |
| 5 | 48 |
| 6 | 336 |
| 7 | 576 |
| 8 | 2160 |
| 9 | 3840 |
| 10 | 25344 |
| 11 | 17280 |
| 12 | 262080 |
| 13 | 322560 |
| 14 | 829440 |
| 15 | 1548288 |
| 16 | 21150720 |
| 17 | 16588800 |
| 18 | 73543680 |
| 19 | 139345920 |
| 20 | 766402560 |
| 21 | 1459814400 |
| 22 | 9157017600 |
| 23 | 4087480320 |
| 24 | 90574848000 |
| 25 | 130427781120 |
| 26 | 361184624640 |
[2,6,8,60,48,336,576,2160,3840,25344,17280,262080, 322560,829440,1548288,21150720,16588800,73543680, 139345920,766402560,1459814400,9157017600, 4087480320,90574848000,130427781120,361184624640] |