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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 14 |
| 5 | 34 |
| 6 | 75 |
| 7 | 187 |
| 8 | 551 |
| 9 | 1954 |
| 10 | 8317 |
| 11 | 38582 |
| 12 | 200978 |
| 13 | 1125541 |
| 14 | 6562122 |
| 15 | 40444003 |
| 16 | 266832233 |
| 17 | 1870169623 |
| 18 | 13424553758 |
| 19 | 101495825622 |
| 20 | 793832121165 |
| 21 | 6325729776075 |
| 22 | 52616754936494 |
| 23 | 450157758564742 |
| 24 | 3999323787879764 |
| 25 | 37180986240914714 |
| 26 | 353667558431662474 |