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 | 3 |
| 2 | 5 |
| 3 | 17 |
| 4 | 257 |
| 5 | 5189 |
| 6 | 65537 |
| 7 | 83269 |
| 8 | 86293 |
| 9 | 1053953 |
| 10 | 1066049 |
| 11 | 1134929 |
| 12 | 1311749 |
| 13 | 1380629 |
| 14 | 16864513 |
| 15 | 17060929 |
| 16 | 17909009 |
| 17 | 18153809 |
| 18 | 18171217 |
| 19 | 21251141 |
| 20 | 22103317 |
| 21 | 289423441 |
| 22 | 290455889 |
| 23 | 290735441 |
| 24 | 336662789 |
| 25 | 336925957 |
| 26 | 340873541 |