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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 50 |
| 5 | 1713 |
| 6 | 1101990 |
| 7 | 68715891672 |
| 8 | 1180735735356264714926 |
| 9 | 170141183460507906731293351306487161569 |
| 10 | 7237005577335553223087828975127304177495735363998991435497132228228565768846 |
[1,1,1,5,50,1713,1101990,68715891672, 1180735735356264714926, 170141183460507906731293351306487161569, 72370055773355532230878289751273041774957353639989\ 91435497132228228565768846] |