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) |
|---|---|
| 21 | 1 |
| 22 | 2 |
| 23 | 8 |
| 24 | 21 |
| 25 | 60 |
| 26 | 160 |
| 27 | 281 |
| 28 | 655 |
| 29 | 1003 |
| 30 | 1102 |