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 | 11111111111 |
| 2 | 101111111111 |
| 3 | 110111111111 |
| 4 | 111011111111 |
| 5 | 111101111111 |
| 6 | 111110111111 |
| 7 | 111111011111 |
| 8 | 111111101111 |
| 9 | 111111110111 |
| 10 | 111111111011 |
| 11 | 111111111101 |
| 12 | 111111111110 |
| 13 | 1001111111111 |
| 14 | 1010111111111 |
| 15 | 1011011111111 |
| 16 | 1011101111111 |
| 17 | 1011110111111 |
| 18 | 1011111011111 |
| 19 | 1011111101111 |