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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 133 |
| 4 | 497 |
| 5 | 4963 |
| 6 | 34486 |
| 7 | 68978 |
| 8 | 14877929 |
| 9 | 6186632564 |
| 10 | 6186632564 |
[2,11,133,497,4963,34486,68978,14877929, 6186632564,6186632564] |