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 | 1 |
| 2 | 2 |
| 3 | 36 |
| 4 | 13824 |
| 5 | 207360000 |
| 6 | 193491763200000 |
| 7 | 16390160963076096000000 |
| 8 | 173238200573946282828103680000000 |
| 9 | 300679807141675805997423113304381849600000000 |