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 | 6 |
| 2 | 60 |
| 3 | 90 |
| 4 | 36720 |
| 5 | 47520 |
| 6 | 8173440 |
| 7 | 22276800 |
| 8 | 126463680 |
| 9 | 597542400 |
| 10 | 4201148160 |
| 11 | 287704872000 |
| 12 | 1632485836800 |