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 | 17 |
| 5 | 137 |
| 6 | 257 |
| 7 | 65537 |
| 8 | 157217 |
| 9 | 295937 |
| 10 | 557057 |
| 11 | 1336337 |
| 12 | 96550277 |
| 13 | 1212153857 |
| 14 | 2281701377 |
| 15 | 5473632257 |
| 16 | 395469930497 |
| 17 | 1401249857537 |
| 18 | 2637646790657 |
| 19 | 4964982194177 |
| 20 | 28572702478337 |
| 21 | 1271035441709057 |
| 22 | 38280596832649217 |
| 23 | 1872540629620228097 |
| 24 | 6634884445436379137 |