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) |
|---|---|
| 19 | 1 |
| 20 | 2 |
| 21 | 12 |
| 22 | 29 |
| 23 | 130 |
| 24 | 329 |
| 25 | 1239 |
| 26 | 3329 |
| 27 | 11128 |
| 28 | 30766 |
| 29 | 95946 |