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 | 1 |
| 2 | 100 |
| 3 | 1100 |
| 4 | 100000 |
| 5 | 1010000 |
| 6 | 11000000 |
| 7 | 111000000 |
| 8 | 10000000000 |
| 9 | 100100000000 |
| 10 | 1010000000000 |
| 11 | 10110000000000 |
| 12 | 110000000000000 |
| 13 | 1101000000000000 |
| 14 | 11100000000000000 |
| 15 | 111100000000000000 |