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 | 11 |
| 6 | 101 |
| 7 | 313 |
| 8 | 727 |
| 9 | 757 |
| 10 | 919 |
| 11 | 929 |
| 12 | 31013 |
| 13 | 72227 |
| 14 | 73037 |
| 15 | 73237 |
| 16 | 74047 |
| 17 | 75557 |
| 18 | 76367 |
| 19 | 76667 |
| 20 | 77377 |
| 21 | 77477 |
| 22 | 91019 |
| 23 | 93139 |
| 24 | 93239 |
| 25 | 94049 |
| 26 | 94349 |
| 27 | 96269 |
| 28 | 96469 |
| 29 | 97379 |
| 30 | 97579 |
| 31 | 98389 |
| 32 | 98689 |
| 33 | 3211123 |
| 34 | 3222223 |
| 35 | 3310133 |
| 36 | 3321233 |
| 37 | 3331333 |
| 38 | 7100017 |
| 39 | 7300037 |
| 40 | 7310137 |