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 | 9 |
| 2 | 729 |
| 3 | 531441 |
| 4 | 2503155504993241601315571986085849 |
| 5 | 4638397686588101979328150167890591454318967698009 |