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 | 0 |
| 2 | 441 |
| 3 | 21660 |
| 4 | 4096576 |
| 5 | 438377904 |
| 6 | 56606878084 |
| 7 | 6757282699788 |
| 8 | 830820670081600 |
| 9 | 100904384322992160 |