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 | 0 |
| 1 | 2 |
| 2 | 1210 |
| 3 | 222110 |
| 4 | 424120 |
| 5 | 24523120 |
| 6 | 153413522120 |
| 7 | 352433624120 |
| 8 | 16353453624120 |
| 9 | 36354463523120 |
| 10 | 46454473423120 |
| 11 | 1736357463422120 |
| 12 | 3736257453523120 |
| 13 | 4736453473623120 |
| 14 | 4736454483522120 |
| 15 | 183736357463522120 |