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 | 11 |
| 2 | 70 |
| 3 | 348 |
| 4 | 1449 |
| 5 | 5334 |
| 6 | 17822 |
| 7 | 55165 |
| 8 | 160215 |
| 9 | 441105 |
| 10 | 1159752 |
| 11 | 2929465 |
| 12 | 7142275 |
| 13 | 16873472 |
| 14 | 38749850 |
| 15 | 86737678 |
| 16 | 189672868 |
| 17 | 405991500 |
| 18 | 852077072 |
| 19 | 1756048833 |
| 20 | 3558408287 |
| 21 | 7098041203 |
| 22 | 13951818365 |
| 23 | 27047831797 |
| 24 | 51760979985 |