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 | 3 |
| 2 | 5 |
| 3 | 5 |
| 4 | 7 |
| 5 | 29 |
| 6 | 31 |
| 7 | 809 |
| 8 | 811 |
| 9 | 1229 |
| 10 | 1231 |
| 11 | 1289 |
| 12 | 1291 |
| 13 | 2129 |
| 14 | 2131 |
| 15 | 2309 |
| 16 | 2311 |
| 17 | 2729 |
| 18 | 2731 |
| 19 | 2789 |
| 20 | 2791 |
| 21 | 2999 |
| 22 | 3001 |
| 23 | 3299 |
| 24 | 3301 |
| 25 | 3329 |
| 26 | 3331 |
| 27 | 3389 |
| 28 | 3391 |
| 29 | 3929 |
| 30 | 3931 |
| 31 | 4229 |
| 32 | 4231 |
| 33 | 5009 |
| 34 | 5011 |
| 35 | 5099 |
| 36 | 5101 |
| 37 | 6089 |
| 38 | 6091 |
| 39 | 6299 |
| 40 | 6301 |
| 41 | 6689 |
| 42 | 6691 |
| 43 | 7589 |
| 44 | 7591 |
| 45 | 8009 |
| 46 | 8011 |