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) |
|---|---|
| 3 | 1 |
| 4 | 11 |
| 5 | 40 |
| 6 | 403 |
| 7 | 1224 |
| 8 | 4886 |
| 9 | 19096 |
| 10 | 120137 |
| 11 | 485941 |
| 12 | 2974628 |
| 13 | 25293838 |