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) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 5760 |
| 3 | 580608 |
| 4 | 1393459200 |
| 5 | 73574645760 |
| 6 | 24103053950976000 |
| 7 | 578473294823424000 |
| 8 | 9440684171518279680000 |
| 9 | 271211974879377138647040000 |
| 10 | 3579998068407778230140928000000 |
| 11 | 282308419108727654719684608000000 |
| 12 | 258955866680053703121272297226240000000 |