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| n | a(n) |
|---|---|
| 1 | 145808838 |
| 2 | 475728999902 |
| 3 | 1594644874059338 |
| 4 | 5314583162402080764 |
| 5 | 17779987852107633361760 |
[145808838,475728999902,1594644874059338, 5314583162402080764,17779987852107633361760] |