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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 1251 |
| 3 | 31300 |
| 4 | 1566251 |
| 5 | 39187575 |
| 6 | 1960945001 |
| 7 | 49062812600 |
| 8 | 2455101575001 |
| 9 | 61426602187625 |
| 10 | 3073785210956251 |
| 11 | 76906056876093900 |
| 12 | 3848376629015651251 |
| 13 | 96286321782267375175 |
| 14 | 4818164465742384410001 |
| 15 | 120550397965341877625200 |
| 16 | 6032338062732836265670001 |
[1,25,1251,31300,1566251,39187575,1960945001, 49062812600,2455101575001,61426602187625, 3073785210956251,76906056876093900, 3848376629015651251,96286321782267375175, 4818164465742384410001,120550397965341877625200, 6032338062732836265670001] |