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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 43 |
| 6 | 143 |
| 7 | 496 |
| 8 | 1794 |
| 9 | 6667 |
| 10 | 25345 |
| 11 | 98032 |
| 12 | 384713 |
| 13 | 1527480 |
| 14 | 6125327 |
| 15 | 24770186 |
| 16 | 100897860 |
| 17 | 413595904 |
| 18 | 1704840125 |
| 19 | 7062024986 |
| 20 | 29382224119 |
| 21 | 122731488819 |
| 22 | 514491387498 |
| 23 | 2163757816681 |
| 24 | 9126920239124 |
| 25 | 38602653740841 |