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 | 12 |
| 2 | 21 |
| 3 | 1122 |
| 4 | 1212 |
| 5 | 1221 |
| 6 | 2112 |
| 7 | 2121 |
| 8 | 2211 |
| 9 | 111222 |
| 10 | 112122 |
| 11 | 112212 |
| 12 | 112221 |
| 13 | 121122 |
| 14 | 121212 |
| 15 | 121221 |
| 16 | 122112 |
| 17 | 122121 |
| 18 | 122211 |
| 19 | 211122 |
| 20 | 211212 |
| 21 | 211221 |
| 22 | 212112 |
| 23 | 212121 |
| 24 | 212211 |
| 25 | 221112 |
| 26 | 221121 |
| 27 | 221211 |
| 28 | 222111 |
| 29 | 11112222 |
| 30 | 11121222 |
| 31 | 11122122 |
| 32 | 11122212 |
| 33 | 11122221 |