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 | 257 |
| 3 | 65537 |
| 4 | 2070241 |
| 5 | 100006561 |
| 6 | 435746497 |
| 7 | 815730977 |
| 8 | 832507937 |
| 9 | 1475795617 |
| 10 | 2579667841 |
| 11 | 4338014017 |
| 12 | 5110698017 |
| 13 | 6975822977 |
| 14 | 16983628577 |
| 15 | 17995718017 |
| 16 | 25605764801 |
| 17 | 32575757441 |
| 18 | 37822859617 |
| 19 | 37839636577 |
| 20 | 54875880097 |
| 21 | 54876264161 |
| 22 | 103910985281 |
| 23 | 110081078977 |