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) |
|---|---|
| 0 | 21 |
| 1 | 117 |
| 2 | 241 |
| 3 | 283 |
| 4 | 389 |
| 5 | 517 |
| 6 | 547 |
| 7 | 627 |
| 8 | 1219 |
| 9 | 1223 |
| 10 | 1247 |
| 11 | 1285 |
| 12 | 1287 |
| 13 | 1323 |
| 14 | 1467 |
| 15 | 1505 |
| 16 | 1591 |
| 17 | 1599 |
| 18 | 1689 |
| 19 | 1713 |
| 20 | 1817 |
| 21 | 1961 |
| 22 | 2203 |
| 23 | 2309 |
| 24 | 2377 |
| 25 | 2607 |
| 26 | 2837 |
| 27 | 2847 |
| 28 | 2899 |
| 29 | 2911 |
| 30 | 3227 |
| 31 | 3261 |
| 32 | 3499 |
| 33 | 3823 |
| 34 | 4007 |
| 35 | 4069 |
| 36 | 4183 |
| 37 | 4347 |
| 38 | 4403 |
| 39 | 4473 |
| 40 | 4507 |
| 41 | 4535 |
| 42 | 4637 |