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 | 5 |
| 2 | 247 |
| 3 | 156579 |
| 4 | 1191861707 |
| 5 | 109495018399901 |
| 6 | 121266251495154433997 |
| 7 | 1619036215215662119089701145 |
| 8 | 260573722827793207854814217971985907 |