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 | 11 |
| 2 | 211 |
| 3 | 1123 |
| 4 | 1423 |
| 5 | 112543 |
| 6 | 1124653 |
| 7 | 1234657 |
| 8 | 112345687 |
| 9 | 1123468597 |
| 10 | 10123457689 |