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 | 2 |
| 2 | 11 |
| 3 | 1777 |
| 4 | 23333 |
| 5 | 199999 |
| 6 | 2999999 |
| 7 | 19999999 |
| 8 | 577777777 |
| 9 | 1777777777 |
| 10 | 23333333333 |
| 11 | 311111111111 |
| 12 | 2111111111111 |
| 13 | 17777777777777 |
| 14 | 499999999999999 |
| 15 | 1333333333333333 |
| 16 | 23333333333333333 |