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 | 10 |
| 3 | 11 |
| 4 | 101 |
| 5 | 111 |
| 6 | 1011 |
| 7 | 1101 |
| 8 | 1111 |
| 9 | 10111 |
| 10 | 11011 |
| 11 | 11101 |
| 12 | 11111 |
| 13 | 101111 |
| 14 | 110111 |
| 15 | 111011 |
| 16 | 111101 |
| 17 | 111111 |
| 18 | 1011111 |
| 19 | 1101111 |
| 20 | 1110111 |
| 21 | 1111011 |
| 22 | 1111101 |
| 23 | 1111111 |
| 24 | 10111111 |
| 25 | 11011111 |
| 26 | 11101111 |
| 27 | 11110111 |
| 28 | 11111011 |
| 29 | 11111101 |