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) |
|---|---|
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 0 |
| 6 | 4 |
| 7 | 0 |
| 8 | 40 |
| 9 | 0 |
| 10 | 64 |
| 11 | 0 |
| 12 | 316 |
| 13 | 6 |
| 14 | 448 |
| 15 | 90 |
| 16 | 3529 |
| 17 | 14 |
| 18 | 3836 |
| 19 | 0 |