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 | 2 |
| 2 | 5 |
| 3 | 28 |
| 4 | 417 |
| 5 | 14322 |
| 6 | 461890 |
| 7 | 46908264 |
| 8 | 7362724275 |
| 9 | 4418626443462 |