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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 13 |
| 4 | 89 |
| 5 | 233 |
| 6 | 1597 |
| 7 | 514229 |
| 8 | 99194853094755497 |
| 9 | 19134702400093278081449423917 |
[3,5,13,89,233,1597,514229,99194853094755497, 19134702400093278081449423917] |