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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 7 |
| 6 | 8 |
| 7 | 10 |
| 8 | 18 |
| 9 | 21 |
| 10 | 42 |
| 11 | 51 |
| 12 | 91 |
| 13 | 133 |
| 14 | 177 |
| 15 | 182 |
| 16 | 310 |
| 17 | 3175 |
| 18 | 9566 |
| 19 | 32841 |