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 | 12285 |
| 1 | 3 |
| 2 | 7 |
| 3 | 779 |
| 4 | 31 |
| 5 | 37 |
| 6 | 127 |
| 7 | 651 |
| 8 | 2927269 |
| 9 | 93 |
| 10 | 25329329 |
| 11 | 7230607 |
| 12 | 8191 |
| 13 | 66445153 |
| 14 | 7613527 |
| 15 | 18431675687 |
| 16 | 131071 |
| 17 | 264003743 |
| 18 | 524287 |
| 19 | 59592560831 |
| 20 | 949755039781 |