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 | 1 |
| 2 | 137243 |
| 3 | 2517961 |
| 4 | 117741349 |
| 5 | 369940993 |
| 6 | 19049924867 |
| 7 | 30861256333 |
| 8 | 1087115897989 |
| 9 | 38969560049629 |