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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 24 |
| 5 | 88 |
| 6 | 381 |
| 7 | 1822 |
| 8 | 9254 |
| 9 | 49295 |
| 10 | 275219 |
| 11 | 1614968 |
| 12 | 9993871 |
| 13 | 65442602 |
| 14 | 454736731 |
| 15 | 3356546167 |
| 16 | 26272011685 |
| 17 | 217027548533 |
| 18 | 1879608087006 |
| 19 | 16946483469822 |
| 20 | 158067735588494 |
| 21 | 1518042086052977 |
| 22 | 14962182709519890 |
| 23 | 151056371629601794 |
| 24 | 1560637060858070869 |