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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 625 |
| 3 | 5625 |
| 4 | 47089 |
| 5 | 444889 |
| 6 | 3892729 |
| 7 | 32936121 |
| 8 | 283215241 |
| 9 | 2427040225 |
| 10 | 20642505625 |
| 11 | 175841842225 |
| 12 | 1499143116025 |
| 13 | 12764120981481 |
| 14 | 108666218127481 |
| 15 | 925439613839521 |
| 16 | 7880177347151769 |
| 17 | 67093251777369801 |
| 18 | 571284105880558225 |
[25,625,5625,47089,444889,3892729,32936121, 283215241,2427040225,20642505625,175841842225, 1499143116025,12764120981481,108666218127481, 925439613839521,7880177347151769, 67093251777369801,571284105880558225] |