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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 5 |
| 6 | 18 |
| 7 | 15 |
| 8 | 60 |
| 9 | 80 |
| 10 | 293 |
| 11 | 295 |
| 12 | 2217 |
| 13 | 1777 |
| 14 | 9763 |
| 15 | 20632 |
| 16 | 58362 |
| 17 | 79553 |
| 18 | 600696 |
| 19 | 567543 |
| 20 | 3671674 |
| 21 | 6935728 |
| 22 | 23785615 |
| 23 | 31017007 |
| 24 | 246154210 |
| 25 | 282456327 |
| 26 | 1357925621 |
| 27 | 2615206650 |
| 28 | 11358502734 |