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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 400 |
| 4 | 21904 |
| 5 | 2895584 |
| 6 | 1139265009 |
| 7 | 1206854973408 |
| 8 | 2985549816834225 |
| 9 | 18186473807187428754 |
| 10 | 295962659559743287398400 |
| 11 | 12785274595721911779350877195 |
| 12 | 1397108287594488818133966259024144 |
[2,16,400,21904,2895584,1139265009,1206854973408, 2985549816834225,18186473807187428754, 295962659559743287398400, 12785274595721911779350877195, 1397108287594488818133966259024144] |