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 | 1 |
| 2 | 1111 |
| 3 | 110111111 |
| 4 | 1111011011 |
| 5 | 11000111111 |
| 6 | 110011011011 |
| 7 | 110111101111 |
| 8 | 111100011011 |
| 9 | 111101010101 |
| 10 | 111101111011 |
| 11 | 1010011111111 |
| 12 | 1010101001111 |
| 13 | 1010101101101 |
| 14 | 1010111100101 |
| 15 | 1011111001111 |
| 16 | 1100000111111 |
| 17 | 1100110011011 |
| 18 | 1111001011111 |
| 19 | 1111001101111 |