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 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 5 |
| 6 | 7 |
| 7 | 11 |
| 8 | 17 |
| 9 | 31 |
| 10 | 53 |
| 11 | 95 |
| 12 | 173 |
| 13 | 317 |
| 14 | 587 |
| 15 | 1097 |
| 16 | 2049 |
| 17 | 3857 |
| 18 | 7287 |
| 19 | 13799 |
| 20 | 26217 |