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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 1881 |
| 3 | 49905 |
| 4 | 54585 |
| 5 | 63405 |
| 6 | 196785 |
| 7 | 853785 |
| 8 | 2094897 |
| 9 | 3925449 |
| 10 | 32480685 |
| 11 | 1925817945 |
| 12 | 1994453385 |
| 13 | 961201916805 |
[2,1881,49905,54585,63405,196785,853785,2094897, 3925449,32480685,1925817945,1994453385, 961201916805] |