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 | 16 |
| 2 | 6480 |
| 3 | 97287175440 |
| 4 | 1106928595945936328906250000 |
| 5 | 856337316801926460412829104011102303451051923953906250000 |