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) |
|---|---|
| 3 | 71 |
| 4 | 2543 |
| 5 | 146687 |
| 6 | 55871 |
| 7 | 63703 |
| 8 | 353087 |
| 9 | 606239 |
| 10 | 21073228 |
| 11 | 4606428 |
| 12 | 19212172 |
| 13 | 16301375 |
| 14 | 88507864 |
| 15 | 228238087 |
| 16 | 126691212 |
| 17 | 121909855 |
| 18 | 366845415 |
| 19 | 448525727 |
| 20 | 1818767247 |
| 21 | 1319413228 |
| 22 | 341968924 |
| 23 | 673747279 |
| 24 | 188739607 |
| 25 | 2366756975 |
| 26 | 1770393855 |
| 27 | 411629407 |
| 28 | 1240489516 |