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 | 2 |
| 1 | 8 |
| 2 | 1152 |
| 3 | 2580480 |
| 4 | 89181388800 |
| 5 | 48126558103142400 |
| 6 | 409825748158189771161600 |
| 7 | 55428899652335313894424707072000 |