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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 11 |
| 3 | 130 |
| 4 | 5072 |
| 5 | 556742 |
| 6 | 172829660 |
| 7 | 149566037863 |
| 8 | 395003219927359 |
[3,11,130,5072,556742,172829660,149566037863, 395003219927359] |