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 | 8 |
| 2 | 384 |
| 3 | 46080 |
| 4 | 2064384 |
| 5 | 3715891200 |
| 6 | 392398110720 |
| 7 | 1428329123020800 |
| 8 | 274239191619993600 |
| 9 | 1678343852714360832000 |
| 10 | 102043306245033138585600 |
| 11 | 4714400748520531002654720000 |
| 12 | 160144566965128191597871104000 |