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 | 0 |
| 2 | 1 |
| 3 | 112 |
| 4 | 121 |
| 5 | 211 |
| 6 | 1111113 |
| 7 | 1111131 |
| 8 | 1111311 |
| 9 | 1113111 |
| 10 | 1131111 |
| 11 | 1311111 |
| 12 | 3111111 |
| 13 | 11111111111122 |
| 14 | 11111111111212 |
| 15 | 11111111111221 |
| 16 | 11111111112112 |
| 17 | 11111111112121 |
| 18 | 11111111112211 |
| 19 | 11111111121112 |
| 20 | 11111111121121 |