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 | 1 |
| 3 | 1 |
| 4 | 8 |
| 5 | 0 |
| 6 | 14 |
| 7 | 78 |
| 8 | 0 |
| 9 | 22 |
| 10 | 213 |
| 11 | 944 |
| 12 | 0 |
| 13 | 0 |
| 14 | 529 |
| 15 | 3400 |
| 16 | 13800 |
| 17 | 0 |
| 18 | 0 |