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| n | a(n) |
|---|---|
| 1 | 20160 |
| 2 | 4585351680 |
| 3 | 228501000000000 |
| 4 | 65784756654489600 |
| 5 | 273457218604953600 |
| 6 | 54025731402499584000 |
| 7 | 3669292720793456064000 |
| 8 | 122796979335906113871360 |
| 9 | 6973279267500000000000000 |
| 10 | 34426017123500213280276480 |
[20160,4585351680,228501000000000, 65784756654489600,273457218604953600, 54025731402499584000,3669292720793456064000, 122796979335906113871360, 6973279267500000000000000, 34426017123500213280276480] |