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 | 23 |
| 6 | 37 |
| 7 | 53 |
| 8 | 73 |
| 9 | 257 |
| 10 | 523 |
| 11 | 2357 |
| 12 | 2753 |
| 13 | 3257 |
| 14 | 3527 |
| 15 | 5237 |
| 16 | 5273 |
| 17 | 7253 |
| 18 | 7523 |