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 | 1 |
| 1 | 2 |
| 2 | 24 |
| 3 | 2688 |
| 4 | 32342016 |
| 5 | 4677882957791232 |
| 6 | 97861912906883207538212742365184 |
| 7 | 42829440312913272520181533609472356498655100482256687829780267008 |