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 | 5120 |
| 4 | 77384 |
| 5 | 473632 |
| 6 | 1875432 |
| 7 | 5706000 |
| 8 | 14543984 |