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) |
|---|---|
| 3 | 1512 |
| 4 | 91392 |
| 5 | 5911400 |
| 6 | 1120056192 |
| 7 | 252824095384 |
| 8 | 187568248374272 |