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 | 7 |
| 2 | 66 |
| 3 | 999 |
| 4 | 8888 |
| 5 | 66666 |
| 6 | 0 |
| 7 | 5555555 |
| 8 | 99999999 |
| 9 | 111111111 |
| 10 | 1111111111 |