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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 12 |
| 4 | 336 |
| 5 | 30 |
| 6 | 31104 |
| 7 | 56 |
| 8 | 322560 |
| 9 | 4212 |
| 10 | 324000 |
| 11 | 132 |
| 12 | 84276412416 |
| 13 | 182 |
| 14 | 1580544 |
| 15 | 1944000 |
| 16 | 10239344640 |
| 17 | 306 |
| 18 | 2483164449792 |
| 19 | 380 |
| 20 | 6096384000000 |
| 21 | 9483264 |
| 22 | 13799808 |
| 23 | 552 |
| 24 | 1610547321930095001600 |
| 25 | 116250 |
| 26 | 31004064 |
| 27 | 122821920 |
| 28 | 108806975520768 |
| 29 | 870 |
[1,6,12,336,30,31104,56,322560,4212,324000,132, 84276412416,182,1580544,1944000,10239344640,306, 2483164449792,380,6096384000000,9483264,13799808, 552,1610547321930095001600,116250,31004064, 122821920,108806975520768,870] |