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 | 11 |
| 3 | 10 |
| 4 | 100 |
| 5 | 102 |
| 6 | 120 |
| 7 | 1012 |
| 8 | 1023 |
| 9 | 1120 |
| 10 | 1230 |
| 11 | 10123 |
| 12 | 10234 |
| 13 | 11203 |
| 14 | 11230 |
| 15 | 12340 |
| 16 | 101234 |
| 17 | 102345 |
| 18 | 111230 |
| 19 | 112130 |
| 20 | 112340 |
| 21 | 123450 |
| 22 | 1012345 |
| 23 | 1023456 |
| 24 | 1112130 |
| 25 | 1112340 |
| 26 | 1121340 |
| 27 | 1123450 |
| 28 | 1234560 |