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) |
|---|---|
| 0 | 3 |
| 1 | 2 |
| 2 | 17 |
| 3 | 2089 |
| 4 | 65537 |
| 5 | 3193361 |
| 6 | 445341529 |
| 7 | 4190216689 |
| 8 | 25140740257 |
| 9 | 813368268793 |
| 10 | 333413867957257 |
| 11 | 1057543811051633 |
| 12 | 1448734752622601 |