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| n | a(n) |
|---|---|
| 1 | 2642 |
| 2 | 10925 |
| 3 | 47283 |
| 4 | 220126 |
| 5 | 1006996 |
| 6 | 4613955 |
| 7 | 21367247 |
| 8 | 98911734 |
| 9 | 458586500 |
| 10 | 2132449553 |
| 11 | 9926655163 |
| 12 | 46235660410 |
| 13 | 215513433328 |
| 14 | 1005039527604 |
| 15 | 4688140595267 |
| 16 | 21872823325681 |
| 17 | 102063694534105 |
| 18 | 476294012358476 |
[2642,10925,47283,220126,1006996,4613955,21367247, 98911734,458586500,2132449553,9926655163, 46235660410,215513433328,1005039527604, 4688140595267,21872823325681,102063694534105, 476294012358476] |