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 | 2 |
| 1 | 2 |
| 2 | 8 |
| 3 | 72 |
| 4 | 1536 |
| 5 | 86080 |
| 6 | 14487040 |
| 7 | 8274797440 |
| 8 | 17494930604032 |