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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 129644790 |
| 3 | 1914992149823954412750 |
| 4 | 3118154713099658349261989389351453752 |
| 5 | 1091385182415179567904447175900607727196876211756373000 |
[1,129644790,1914992149823954412750, 3118154713099658349261989389351453752, 10913851824151795679044471759006077271968762117563\ 73000] |