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) |
|---|---|
| 3 | 1200 |
| 4 | 5400 |
| 5 | 29520 |
| 6 | 187200 |
| 7 | 1310400 |
| 8 | 9813600 |
| 9 | 77193600 |
| 10 | 630538632 |
| 11 | 5307656400 |