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 | 5 |
| 2 | 307 |
| 3 | 33191 |
| 4 | 321193 |
| 5 | 18889465931478650198741 |
| 6 | 401734511064747568885490523085290650630550748445707718725843 |