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 | 7997476042075799759100487262680802918400 |
| 2 | 2542750473636273484480959502278043289108758407541532509234790400 |