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 | 5 |
| 4 | 19 |
| 5 | 139 |
| 6 | 149 |
| 7 | 311 |
| 8 | 6827 |
| 9 | 7949 |
| 10 | 27743 |
| 11 | 29663 |
| 12 | 29759 |
| 13 | 31249 |
| 14 | 101281 |
| 15 | 124213 |
| 16 | 130729 |
| 17 | 135271 |
| 18 | 169691 |
| 19 | 177019 |
| 20 | 361967 |
| 21 | 508009 |
| 22 | 568439 |
| 23 | 815351 |