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 | 10 |
| 2 | 1011 |
| 3 | 1101 |
| 4 | 10001 |
| 5 | 11111 |
| 6 | 110101 |
| 7 | 1000111 |
| 8 | 1001111 |
| 9 | 1100001 |
| 10 | 1100101 |
| 11 | 1100111 |
| 12 | 1101011 |
| 13 | 11010011 |
| 14 | 11101001 |
| 15 | 11111011 |
| 16 | 100010101 |
| 17 | 101011101 |
| 18 | 101101111 |
| 19 | 110101111 |
| 20 | 110110111 |
| 21 | 111001001 |
| 22 | 111110111 |
| 23 | 1000001001 |