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 | 7 |
| 3 | 17 |
| 4 | 31 |
| 5 | 89 |
| 6 | 127 |
| 7 | 607 |
| 8 | 2203 |
| 9 | 3217 |
| 10 | 4423 |
| 11 | 9941 |
| 12 | 19937 |
| 13 | 23209 |
| 14 | 86243 |
| 15 | 132049 |
| 16 | 756839 |
| 17 | 1257787 |
| 18 | 2976221 |
| 19 | 6972593 |
| 20 | 20996011 |
| 21 | 25964951 |
| 22 | 32582657 |
| 23 | 42643801 |
| 24 | 57885161 |