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 | 1 |
| 2 | 11 |
| 3 | 101 |
| 4 | 1111 |
| 5 | 10111 |
| 6 | 101111 |
| 7 | 1011001 |
| 8 | 1100101 |
| 9 | 10010101 |
| 10 | 10011101 |
| 11 | 10100011 |
| 12 | 10101101 |
| 13 | 10110011 |
| 14 | 10111001 |
| 15 | 11000111 |
| 16 | 11100101 |
| 17 | 11110111 |
| 18 | 11111101 |
| 19 | 100100111 |
| 20 | 100111001 |
| 21 | 101001001 |
| 22 | 101001011 |
| 23 | 101100011 |
| 24 | 101101111 |
| 25 | 101111011 |
| 26 | 101111111 |
| 27 | 110010101 |
| 28 | 110101001 |