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) |
|---|---|
| 2 | 357913941 |
| 3 | 8218237436320 |
| 4 | 197632881512065275 |
| 5 | 4887273170271827787216 |