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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 12 |
| 3 | 3780 |
| 4 | 44844800 |
| 5 | 26352845268750 |
| 6 | 953083353075475894272 |
| 7 | 2537540586421634737033298208000 |
| 8 | 579150777545101402084349505293757972480000 |
| 9 | 12933741941622730846344367593442776825612980847409218750 |
| 10 | 31768605393074559234133528464091374346848946682424165820313600000000000 |
[1,1,12,3780,44844800,26352845268750, 953083353075475894272, 2537540586421634737033298208000, 579150777545101402084349505293757972480000, 12933741941622730846344367593442776825612980847409\ 218750, 31768605393074559234133528464091374346848946682424\ 165820313600000000000] |