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 | 1 |
| 1 | 10 |
| 2 | 11 |
| 3 | 110 |
| 4 | 1001 |
| 5 | 10010 |
| 6 | 11011 |
| 7 | 110110 |
| 8 | 1010001 |
| 9 | 10010110 |
| 10 | 11111111 |
| 11 | 111111110 |
| 12 | 1011111101 |
| 13 | 10111111010 |
| 14 | 100011110111 |
| 15 | 1011111101000 |
| 16 | 1101011100101 |
| 17 | 10111111010000 |
| 18 | 11001011001101 |
| 19 | 101111110100000 |