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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 76 |
| 4 | 3394 |
| 5 | 547874 |
| 6 | 280203939 |
| 7 | 466328648058 |
| 8 | 2525576718158704 |
| 9 | 44298467976731953802 |
| 10 | 2511317101071327391390891 |
[1,5,76,3394,547874,280203939,466328648058, 2525576718158704,44298467976731953802, 2511317101071327391390891] |