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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 625 |
| 3 | 3969 |
| 4 | 38809 |
| 5 | 328329 |
| 6 | 2934369 |
| 7 | 25674489 |
| 8 | 226171521 |
| 9 | 1987822225 |
| 10 | 17489798001 |
| 11 | 153843588441 |
| 12 | 1353352975569 |
| 13 | 11904328570225 |
| 14 | 104711812628641 |
| 15 | 921054699347689 |
| 16 | 8101789118783721 |
| 17 | 71265503266440025 |
| 18 | 626870990394918801 |
[25,625,3969,38809,328329,2934369,25674489, 226171521,1987822225,17489798001,153843588441, 1353352975569,11904328570225,104711812628641, 921054699347689,8101789118783721, 71265503266440025,626870990394918801] |