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 | 24 |
| 1 | 8709120 |
| 2 | 759246199455744000 |
| 3 | 92358580167818066670290731008000000 |
| 4 | 57303733451473984666829812178837795780510487674880000000000 |