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) |
|---|---|
| 1 | 168 |
| 2 | 10752 |
| 3 | 331520 |
| 4 | 691200 |
| 5 | 1556480 |
| 6 | 1612800 |
| 7 | 106151936 |
| 8 | 5099962368 |
| 9 | 4010593484800 |