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 | 2 |
| 1 | 2 |
| 2 | 2 |
| 3 | 7 |
| 4 | 27 |
| 5 | 377 |
| 6 | 71252 |
| 7 | 725274107 |
| 8 | 19482315963330427 |
| 9 | 1006792136061113006060577048627 |