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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 4 |
| 5 | 16 |
| 6 | 72 |
| 7 | 244 |
| 8 | 1012 |
| 9 | 3976 |
| 10 | 18440 |
| 11 | 81252 |
| 12 | 388188 |
| 13 | 1800728 |
| 14 | 8769964 |