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 | 120 |
| 2 | 720 |
| 3 | 2520 |
| 4 | 6720 |
| 5 | 15120 |
| 6 | 30240 |
| 7 | 55440 |
| 8 | 240240 |
| 9 | 360360 |