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 | 3 |
| 2 | 14 |
| 3 | 102 |
| 4 | 311 |
| 5 | 1433 |
| 6 | 10404 |
| 7 | 32222 |
| 8 | 202221 |
| 9 | 1112213 |
| 10 | 3342144 |
| 11 | 21132042 |
| 12 | 114001231 |
| 13 | 402004243 |
| 14 | 2211023334 |
| 15 | 12133131112 |
| 16 | 42004443341 |
| 17 | 231024441123 |
| 18 | 1243134423424 |
| 19 | 4340014331332 |
| 20 | 24120104100101 |