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 | 0 |
| 1 | 10 |
| 2 | 1010 |
| 3 | 1100 |
| 4 | 101010 |
| 5 | 101100 |
| 6 | 110010 |
| 7 | 110100 |
| 8 | 111000 |
| 9 | 10101010 |
| 10 | 10101100 |
| 11 | 10110010 |
| 12 | 10110100 |
| 13 | 10111000 |
| 14 | 11001010 |
| 15 | 11001100 |
| 16 | 11010010 |
| 17 | 11010100 |
| 18 | 11011000 |
| 19 | 11100010 |
| 20 | 11100100 |
| 21 | 11101000 |
| 22 | 11110000 |
| 23 | 1010101010 |
| 24 | 1010101100 |
| 25 | 1010110010 |
| 26 | 1010110100 |
| 27 | 1010111000 |