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) |
|---|---|
| 3 | 1 |
| 4 | 53 |
| 5 | 4943 |
| 6 | 12300529 |
| 7 | 134480655082 |
| 8 | 84649132742336262 |
| 9 | 212615053823090089357638 |