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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 561 |
| 3 | 2914395 |
| 4 | 54862627919 |
| 5 | 2468722942369153 |
| 6 | 211109968702038259993 |
| 7 | 29745278219128813035415595 |
| 8 | 6273648300104128965616586081511 |
| 9 | 1850042480471503379038420801262526759 |
| 10 | 725168149513389307543056971716033431701831 |
[1,1,561,2914395,54862627919,2468722942369153, 211109968702038259993,29745278219128813035415595, 6273648300104128965616586081511, 1850042480471503379038420801262526759, 725168149513389307543056971716033431701831] |