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 | 6 |
| 1 | 60480 |
| 2 | 440884080 |
| 3 | 6255156277440 |
| 4 | 117715791990353760 |
| 5 | 2591176156368821985600 |