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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 24 |
| 3 | 84 |
| 4 | 120 |
| 5 | 270 |
| 6 | 672 |
| 7 | 1488 |
| 8 | 1638 |
| 9 | 6200 |
| 10 | 24384 |
| 11 | 174592 |
| 12 | 523776 |
| 13 | 44736512 |
| 14 | 91963648 |
| 15 | 100651008 |
| 16 | 459818240 |
| 17 | 1476304896 |
| 18 | 10200236032 |
| 19 | 25769607168 |
| 20 | 51001180160 |
| 21 | 412316073984 |
[12,24,84,120,270,672,1488,1638,6200,24384,174592, 523776,44736512,91963648,100651008,459818240, 1476304896,10200236032,25769607168,51001180160, 412316073984] |