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 | 7 |
| 2 | 13 |
| 3 | 24 |
| 4 | 55 |
| 5 | 126 |
| 6 | 330 |
| 7 | 836 |
| 8 | 2232 |
| 9 | 5926 |
| 10 | 15932 |
| 11 | 42849 |
| 12 | 116011 |
| 13 | 314375 |
| 14 | 854952 |
| 15 | 2329162 |
| 16 | 6359574 |
| 17 | 17393334 |
| 18 | 47653952 |
| 19 | 130752976 |
| 20 | 359275056 |
| 21 | 988458426 |
| 22 | 2722803495 |