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 | 1 |
| 2 | 11 |
| 3 | 21 |
| 4 | 1112 |
| 5 | 1231 |
| 6 | 11131211 |
| 7 | 2112111331 |
| 8 | 112331122112 |
| 9 | 12212221231221 |
| 10 | 11221113121132112211 |
| 11 | 212221121321121113312221 |
| 12 | 113211233112211213111221321112 |