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 | 212 |
| 2 | 22122 |
| 3 | 2221222 |
| 4 | 222212222 |
| 5 | 22222122222 |
| 6 | 2222221222222 |
| 7 | 222222212222222 |
| 8 | 22222222122222222 |
| 9 | 2222222221222222222 |
| 10 | 222222222212222222222 |
| 11 | 22222222222122222222222 |
| 12 | 2222222222221222222222222 |
| 13 | 222222222222212222222222222 |
| 14 | 22222222222222122222222222222 |
| 15 | 2222222222222221222222222222222 |