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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1100 |
| 3 | 1101 |
| 4 | 111010000 |
| 5 | 111010001 |
| 6 | 111011100 |
| 7 | 111011101 |
| 8 | 111000000 |
| 9 | 111000001 |
| 10 | 111001100 |
| 11 | 111001101 |
| 12 | 100010000 |
| 13 | 100010001 |
| 14 | 100011100 |
| 15 | 100011101 |
| 16 | 100000000 |
| 17 | 100000001 |
| 18 | 100001100 |
| 19 | 100001101 |
| 20 | 110011010000 |
| 21 | 110011010001 |
| 22 | 110011011100 |
| 23 | 110011011101 |
| 24 | 110011000000 |
| 25 | 110011000001 |