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 | 2 |
| 1 | 13 |
| 2 | 23 |
| 3 | 113 |
| 4 | 137 |
| 5 | 1237 |
| 6 | 1733 |
| 7 | 1373 |
| 8 | 12373 |
| 9 | 11317 |
| 10 | 23719 |
| 11 | 111317 |
| 12 | 113171 |
| 13 | 211373 |
| 14 | 1131379 |
| 15 | 1113173 |
| 16 | 1317971 |
| 17 | 2313797 |
| 18 | 11131733 |
| 19 | 11373379 |
| 20 | 23931379 |
| 21 | 113193797 |
| 22 | 52313797 |
| 23 | 129733313 |
| 24 | 113733797 |
| 25 | 523137971 |
| 26 | 1113179719 |
| 27 | 1317971939 |