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 | 20305 |
| 2 | 30507 |
| 3 | 50711 |
| 4 | 71113 |
| 5 | 111317 |
| 6 | 131719 |
| 7 | 171923 |
| 8 | 192329 |
| 9 | 232931 |