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 | 11 |
| 2 | 1001 |
| 3 | 1010 |
| 4 | 1111 |
| 5 | 100001 |
| 6 | 100010 |
| 7 | 100100 |
| 8 | 101011 |
| 9 | 101101 |
| 10 | 101110 |
| 11 | 110011 |
| 12 | 110101 |
| 13 | 110110 |
| 14 | 111111 |
| 15 | 10000001 |
| 16 | 10000010 |
| 17 | 10000100 |
| 18 | 10001000 |
| 19 | 10010011 |
| 20 | 10010101 |
| 21 | 10010110 |
| 22 | 10011001 |
| 23 | 10011010 |
| 24 | 10011100 |
| 25 | 10100011 |
| 26 | 10100101 |
| 27 | 10100110 |
| 28 | 10101001 |
| 29 | 10101010 |
| 30 | 10101100 |