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 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 27 |
| 4 | 729 |
| 5 | 531441 |
| 6 | 282429536481 |
| 7 | 79766443076872509863361 |
| 8 | 6362685441135942358474828762538534230890216321 |