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 | 993803899780063855042560 |
| 2 | 2028353759451110328141864960 |
| 3 | 6476620014866676143312363520 |