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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 25 |
| 3 | 64 |
| 4 | 144 |
| 5 | 625 |
| 6 | 3969 |
| 7 | 22801 |
| 8 | 104329 |
| 9 | 580644 |
| 10 | 3763600 |
| 11 | 23707161 |
| 12 | 144480400 |
| 13 | 910470276 |
| 14 | 5844449601 |
| 15 | 37337446441 |
| 16 | 237578256400 |
| 17 | 1520187895681 |
| 18 | 9757501690000 |
| 19 | 62593240504921 |
| 20 | 401316721817881 |
| 21 | 2575276886918596 |
[1,25,64,144,625,3969,22801,104329,580644,3763600, 23707161,144480400,910470276,5844449601, 37337446441,237578256400,1520187895681, 9757501690000,62593240504921,401316721817881, 2575276886918596] |