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 | 114 |
| 4 | 28242 |
| 5 | 20808130 |
| 6 | 52897204000 |
| 7 | 491002382171602 |
| 8 | 17246237428303951946 |