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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 29 |
| 5 | 2265 |
| 6 | 18698645 |
| 7 | 1602308616574727 |
| 8 | 14017675267522095175220940844027 |
| 9 | 1245902734717669791621141496863001384336371908521990690157218737 |
[1,1,4,29,2265,18698645,1602308616574727, 14017675267522095175220940844027, 12459027347176697916211414968630013843363719085219\ 90690157218737] |