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 | 13 |
| 3 | 166 |
| 4 | 4009 |
| 5 | 169469 |
| 6 | 10949857 |
| 7 | 1078348288 |
| 8 | 138679521597 |
| 9 | 24402542896843 |
| 10 | 5348124003487173 |