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 | 11 |
| 2 | 121 |
| 3 | 1111 |
| 4 | 12321 |
| 5 | 111111 |
| 6 | 1214121 |
| 7 | 11311311 |
| 8 | 121252121 |
| 9 | 1111111111 |
| 10 | 12341614321 |
| 11 | 111111111111 |
| 12 | 1212127212121 |
| 13 | 11315311351311 |
| 14 | 121412181214121 |
| 15 | 1111111111111111 |
| 16 | 12321612921612321 |
| 17 | 111111111111111111 |