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 | 7 |
| 2 | 9 |
| 3 | 17 |
| 4 | 19 |
| 5 | 23 |
| 6 | 43 |
| 7 | 47 |
| 8 | 67 |
| 9 | 73 |
| 10 | 83 |
| 11 | 103 |
| 12 | 109 |
| 13 | 139 |
| 14 | 149 |
| 15 | 157 |
| 16 | 173 |
| 17 | 179 |
| 18 | 223 |
| 19 | 239 |
| 20 | 281 |
| 21 | 311 |
| 22 | 313 |
| 23 | 349 |
| 24 | 431 |
| 25 | 557 |
| 26 | 569 |
| 27 | 577 |
| 28 | 587 |