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 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 16 |
| 5 | 41 |
| 6 | 119 |
| 7 | 321 |
| 8 | 880 |
| 9 | 2286 |
| 10 | 5640 |
| 11 | 12443 |
| 12 | 23668 |
| 13 | 36260 |
| 14 | 43038 |
| 15 | 38135 |
| 16 | 25727 |
| 17 | 13262 |
| 18 | 5506 |
| 19 | 1751 |
| 20 | 468 |
| 21 | 87 |
| 22 | 16 |
| 23 | 1 |
| 24 | 1 |