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) |
|---|---|
| 7 | 0 |
| 8 | 3 |
| 9 | 20 |
| 10 | 99 |
| 11 | 450 |
| 12 | 1896 |
| 13 | 7771 |
| 14 | 30895 |
| 15 | 121144 |
| 16 | 468409 |
| 17 | 1796584 |
| 18 | 6841014 |
| 19 | 25925062 |