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 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 17 |
| 6 | 53 |
| 7 | 65 |
| 8 | 177 |
| 9 | 293 |
| 10 | 625 |
| 11 | 1025 |
| 12 | 2541 |
| 13 | 4097 |
| 14 | 8769 |
| 15 | 17109 |
| 16 | 34561 |
| 17 | 65537 |
| 18 | 136013 |
| 19 | 262145 |
| 20 | 534481 |
| 21 | 1054629 |
| 22 | 2110465 |
| 23 | 4194305 |
| 24 | 8449325 |
| 25 | 16787217 |
| 26 | 33615873 |
| 27 | 67155845 |
| 28 | 134403521 |
| 29 | 268435457 |
| 30 | 537370845 |
| 31 | 1073741825 |
| 32 | 2148270081 |
| 33 | 4295327397 |
| 34 | 8591179777 |