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) |
|---|---|
| 2 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 17 |
| 6 | 41 |
| 7 | 97 |
| 8 | 193 |
| 9 | 257 |
| 10 | 769 |
| 11 | 1153 |
| 12 | 2113 |
| 13 | 4129 |
| 14 | 12289 |
| 15 | 18433 |
| 16 | 40961 |
| 17 | 65537 |
| 18 | 163841 |
| 19 | 270337 |
| 20 | 786433 |
| 21 | 1179649 |
| 22 | 2101249 |
| 23 | 4194433 |
| 24 | 8650753 |
| 25 | 16777729 |
| 26 | 50332673 |
| 27 | 69206017 |
| 28 | 167772161 |
| 29 | 270532609 |
| 30 | 537133057 |
| 31 | 1107296257 |
| 32 | 3221225473 |
| 33 | 6442713089 |
| 34 | 8858370049 |