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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 12 |
| 3 | 81 |
| 4 | 432 |
| 5 | 2025 |
| 6 | 8748 |
| 7 | 35721 |
| 8 | 139968 |
| 9 | 531441 |
| 10 | 1968300 |
| 11 | 7144929 |
| 12 | 25509168 |
| 13 | 89813529 |
| 14 | 312487308 |
| 15 | 1076168025 |
| 16 | 3673320192 |
| 17 | 12440502369 |
| 18 | 41841412812 |
| 19 | 139858796529 |
| 20 | 464904586800 |
| 21 | 1537671920841 |
| 22 | 5062810950252 |
| 23 | 16600580533161 |
| 24 | 54226471004352 |
| 25 | 176518460300625 |