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 | 10 |
| 3 | 11 |
| 4 | 100 |
| 5 | 21 |
| 6 | 1000 |
| 7 | 31 |
| 8 | 10000 |
| 9 | 41 |
| 10 | 100000 |
| 11 | 51 |
| 12 | 1000000 |
| 13 | 61 |
| 14 | 10000000 |
| 15 | 71 |
| 16 | 100000000 |
| 17 | 81 |
| 18 | 2817 |