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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2431 |
| 2 | 4061871 |
| 3 | 7528988476 |
| 4 | 15467641899285 |
| 5 | 34155922905682979 |
| 6 | 79397199549271412737 |
| 7 | 191739533381111401455478 |
| 8 | 476872353039366288373555323 |
[1,2431,4061871,7528988476,15467641899285, 34155922905682979,79397199549271412737, 191739533381111401455478, 476872353039366288373555323] |