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) |
|---|---|
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 5 |
| 8 | 18 |
| 9 | 57 |
| 10 | 285 |
| 11 | 1513 |
| 12 | 9824 |
| 13 | 69536 |
| 14 | 540622 |
| 15 | 4494676 |