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) |
|---|---|
| 10 | 111119 |
| 11 | 4999999 |
| 12 | 66666667 |
| 13 | 666666667 |
| 14 | 9000100009 |
| 15 | 66666666667 |