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 | 2880 |
| 3 | 1036800 |
| 4 | 870912000 |
| 5 | 1463132160000 |
| 6 | 4424511651840000 |
| 7 | 22299538725273600000 |
| 8 | 176612346704166912000000 |
| 9 | 2098154678845502914560000000 |
| 10 | 36004334288988830013849600000000 |