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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 203 |
| 4 | 5765385 |
| 5 | 662305416760 |
| 6 | 202380163158922023 |
| 7 | 141390361908351519807928 |
[0,1,203,5765385,662305416760,202380163158922023, 141390361908351519807928] |