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 | 5 |
| 2 | 17 |
| 3 | 257 |
| 4 | 353 |
| 5 | 769 |
| 6 | 1201 |
| 7 | 12289 |
| 8 | 13313 |
| 9 | 35969 |
| 10 | 65537 |
| 11 | 114689 |
| 12 | 163841 |
| 13 | 169553 |
| 14 | 7699649 |
| 15 | 9379841 |
| 16 | 11886593 |
| 17 | 28667393 |
| 18 | 64749569 |
| 19 | 70254593 |
| 20 | 134818753 |
| 21 | 197231873 |
| 22 | 4643094529 |
| 23 | 19847446529 |
| 24 | 47072139617 |
| 25 | 206158430209 |
| 26 | 452850614273 |
| 27 | 531968664833 |
| 28 | 943558259713 |