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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 22 |
| 3 | 242 |
| 4 | 24442 |
| 5 | 4204024 |
| 6 | 42044444024 |
| 7 | 4204486446844024 |
| 8 | 420448648888888846844024 |
| 9 | 42049644864886388888368846844694024 |
[2,22,242,24442,4204024,42044444024, 4204486446844024,420448648888888846844024, 42049644864886388888368846844694024] |