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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 210 |
| 4 | 1203120212011200 |
| 5 | 7484953557760474849535577603748495355776027484953557760174849535577600 |
[1,10,210,1203120212011200, 74849535577604748495355776037484953557760274849535\ 57760174849535577600] |