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 | 1111 |
| 2 | 11110 |
| 3 | 111100 |
| 4 | 1111000 |
| 5 | 11110000 |
| 6 | 111100000 |
| 7 | 1111000000 |
| 8 | 11110000000 |
| 9 | 111100000000 |
| 10 | 111100001111 |
| 11 | 1111000000000 |
| 12 | 1111000001111 |
| 13 | 1111000011110 |
| 14 | 1111000011111 |
| 15 | 1111100001111 |
| 16 | 11110000000000 |
| 17 | 11110000001111 |