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 | 2 |
| 2 | 28 |
| 3 | 960 |
| 4 | 46656 |
| 5 | 4561920 |
| 6 | 829440000 |
| 7 | 218972160000 |
| 8 | 73903104000000 |