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 | 353 |
| 2 | 373 |
| 3 | 727 |
| 4 | 757 |
| 5 | 11311 |
| 6 | 31013 |
| 7 | 31513 |
| 8 | 33533 |
| 9 | 37273 |
| 10 | 37573 |
| 11 | 39293 |
| 12 | 71317 |
| 13 | 71917 |
| 14 | 77977 |
| 15 | 1175711 |
| 16 | 1178711 |
| 17 | 1317131 |
| 18 | 1513151 |
| 19 | 1917191 |
| 20 | 3103013 |
| 21 | 3106013 |
| 22 | 3127213 |
| 23 | 3135313 |
| 24 | 3155513 |
| 25 | 3160613 |
| 26 | 3166613 |
| 27 | 3181813 |
| 28 | 3193913 |
| 29 | 3198913 |
| 30 | 3304033 |