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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 123 |
| 2 | 28143753123 |
| 3 | 17656721319717734662791328845675730903632844218828123 |
[3,123,28143753123, 17656721319717734662791328845675730903632844218828\ 123] |