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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 421 |
| 3 | 520017 |
| 4 | 13111482259 |
| 5 | 7470491620551006 |
| 6 | 103937249022030445057526 |
[6,421,520017,13111482259,7470491620551006, 103937249022030445057526] |