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 | 37 |
| 4 | 177 |
| 5 | 17777 |
| 6 | 377777 |
| 7 | 1777777 |
| 8 | 17777777777 |
| 9 | 177777777777777777777 |
| 10 | 377777777777777777777777777777 |
| 11 | 377777777777777777777777777777777777 |
| 12 | 1777777777777777777777777777777777777777777 |