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 | 9 |
| 2 | 69696 |
| 3 | 660969 |
| 4 | 9696996 |
| 5 | 6600069696900969 |
| 6 | 69096090900990609 |
| 7 | 900006066606660060090966606696996 |
| 8 | 609660999069000006699096996606066090996096009966990996609 |