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 | 28 |
| 2 | 48828 |
| 3 | 828828 |
| 4 | 842288428828 |
| 5 | 24884484228828 |
| 6 | 28284882828828 |
| 7 | 2842448222228428828 |