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 | 1001 |
| 2 | 10011 |
| 3 | 10101 |
| 4 | 11001 |
| 5 | 100111 |
| 6 | 101011 |
| 7 | 101101 |
| 8 | 110011 |
| 9 | 110101 |
| 10 | 111001 |
| 11 | 1001111 |
| 12 | 1010111 |
| 13 | 1011011 |
| 14 | 1011101 |
| 15 | 1100111 |
| 16 | 1101011 |
| 17 | 1101101 |
| 18 | 1110011 |
| 19 | 1110101 |
| 20 | 1111001 |
| 21 | 10011111 |
| 22 | 10101111 |
| 23 | 10110111 |
| 24 | 10111011 |
| 25 | 10111101 |
| 26 | 11001111 |
| 27 | 11010111 |
| 28 | 11011011 |
| 29 | 11011101 |
| 30 | 11100111 |
| 31 | 11101011 |