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 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 32 |
| 4 | 1536 |
| 5 | 1048576 |
| 6 | 171798691840 |
| 7 | 1770887431076116955136 |
| 8 | 76223250190290215815795912064716079366144 |