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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 54 |
| 4 | 96 |
| 5 | 37500 |
| 6 | 60 |
| 7 | 49412580 |
| 8 | 107520 |
| 9 | 16533720 |
| 10 | 2520 |
| 11 | 718985409939720 |
| 12 | 27720 |
| 13 | 8395697954737253160 |
| 14 | 360360 |
| 15 | 360360 |
| 16 | 23616552960 |
| 17 | 596208601546720632677647440 |
| 18 | 12252240 |
| 19 | 24240072441867520569208380462960 |
| 20 | 232792560 |
| 21 | 232792560 |
| 22 | 232792560 |
| 23 | 4860817599682675053132316060135142981520 |
[1,4,54,96,37500,60,49412580,107520,16533720,2520, 718985409939720,27720,8395697954737253160,360360, 360360,23616552960,596208601546720632677647440, 12252240,24240072441867520569208380462960, 232792560,232792560,232792560, 4860817599682675053132316060135142981520] |