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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 131 |
| 6 | 151 |
| 7 | 353 |
| 8 | 373 |
| 9 | 727 |
| 10 | 757 |
| 11 | 929 |
| 12 | 11311 |
| 13 | 31513 |
| 14 | 33533 |
| 15 | 37273 |
| 16 | 37573 |
| 17 | 39293 |
| 18 | 71317 |
| 19 | 93739 |
| 20 | 97579 |
| 21 | 1335331 |
| 22 | 3315133 |
| 23 | 3392933 |
| 24 | 7392937 |
| 25 | 9375739 |
| 26 | 373929373 |
| 27 | 733929337 |