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 | 7 |
| 3 | 29 |
| 4 | 1873 |
| 5 | 7672913 |
| 6 | 8045632442437 |
| 7 | 2490002635466567109268165355290155548689 |