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 | 3024 |
| 5 | 133056 |
| 6 | 1330560 |
| 7 | 6879600 |
| 8 | 28828800 |
| 9 | 302702400 |
| 10 | 698544000 |
| 11 | 11763214848 |