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 | 0 |
| 1 | 1 |
| 2 | 68 |
| 3 | 738 |
| 4 | 4368 |
| 5 | 15650 |
| 6 | 50184 |
| 7 | 117698 |
| 8 | 279616 |
| 9 | 538083 |
| 10 | 1064200 |
| 11 | 1771682 |
| 12 | 3223584 |
| 13 | 4826978 |
| 14 | 8003464 |
| 15 | 11549700 |
| 16 | 17895680 |
| 17 | 24137858 |
| 18 | 36589644 |
| 19 | 47046242 |
| 20 | 68359200 |
| 21 | 86861124 |
| 22 | 120474376 |
| 23 | 148036418 |
| 24 | 206356608 |
| 25 | 244531875 |
| 26 | 328234504 |
| 27 | 392263236 |
| 28 | 514104864 |
| 29 | 594824162 |