This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 81 |
| 4 | 225 |
| 5 | 6561 |
| 6 | 2025 |
| 7 | 531441 |
| 8 | 11025 |
| 9 | 50625 |
| 10 | 164025 |
| 11 | 3486784401 |
| 12 | 99225 |
| 13 | 282429536481 |
| 14 | 13286025 |
| 15 | 4100625 |
| 16 | 893025 |
| 17 | 1853020188851841 |
| 18 | 2480625 |
| 19 | 150094635296999121 |
| 20 | 8037225 |
| 21 | 332150625 |
| 22 | 87169610025 |
| 23 | 984770902183611232881 |
| 24 | 12006225 |
| 25 | 2562890625 |
| 26 | 7060738412025 |
| 27 | 121550625 |