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 | 122 |
| 2 | 12 |
| 3 | 1122 |
| 4 | 11212212 |
| 5 | 1121221122121122 |
| 6 | 11212211221211212212112211212212 |
| 7 | 1121221122121121221211221121221122121122112122121121221122121122 |