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) |
|---|---|
| 0 | 9 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 10 |
| 11 | 110 |
| 12 | 1110 |
| 13 | 11110 |
| 14 | 111110 |
| 15 | 1111110 |
| 16 | 11111110 |
| 17 | 111111110 |
| 18 | 1111111110 |
| 19 | 11111111110 |
| 20 | 111111111100 |
| 21 | 1111111111100 |
| 22 | 11111111111100 |
| 23 | 111111111111100 |
| 24 | 1111111111111100 |
| 25 | 11111111111111100 |
| 26 | 111111111111111100 |
| 27 | 1111111111111111100 |
| 28 | 11111111111111111100 |
| 29 | 111111111111111111100 |
| 30 | 1111111111111111111000 |