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 | 2 |
| 3 | 21 |
| 4 | 2112 |
| 5 | 21121221 |
| 6 | 2112122112212112 |
| 7 | 21121221122121121221211221121221 |
| 8 | 2112122112212112122121122112122112212112211212212112122112212112 |