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 | 96 |
| 3 | 368640 |
| 4 | 237817036800 |
| 5 | 44185111712759808000 |
| 6 | 3612115491258144161739571200000 |
| 7 | 184260348281378257834400760180580024320000000 |