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) |
|---|---|
| 2 | 2 |
| 3 | 7 |
| 4 | 19 |
| 5 | 46 |
| 6 | 214 |
| 7 | 394 |
| 8 | 1114 |
| 9 | 3994 |
| 10 | 3826 |
| 11 | 13666 |
| 12 | 83554 |
| 13 | 22234 |
| 14 | 189814 |
| 15 | 644869 |
| 16 | 1387786 |
| 17 | 1427911 |
| 18 | 4355311 |
| 19 | 5715319 |
| 20 | 12807391 |
| 21 | 43030381 |
| 22 | 64320754 |
| 23 | 133826599 |
| 24 | 452980999 |