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 | 3 |
| 2 | 4 |
| 3 | 6 |
| 4 | 12 |
| 5 | 60 |
| 6 | 5040 |
| 7 | 293318625600 |
| 8 | 670059168204585168371476438927421112933837297640990904154667968000000000000 |