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) |
|---|---|
| 0 | 127 |
| 1 | 253 |
| 2 | 505 |
| 3 | 1009 |
| 4 | 2017 |
| 5 | 4033 |
| 6 | 8065 |
| 7 | 16129 |
| 8 | 32257 |
| 9 | 64513 |
| 10 | 129025 |
| 11 | 258049 |
| 12 | 516097 |
| 13 | 1032193 |
| 14 | 2064385 |
| 15 | 4128769 |
| 16 | 8257537 |
| 17 | 16515073 |
| 18 | 33030145 |
| 19 | 66060289 |
| 20 | 132120577 |
| 21 | 264241153 |
| 22 | 528482305 |
| 23 | 1056964609 |
| 24 | 2113929217 |
| 25 | 4227858433 |
| 26 | 8455716865 |
| 27 | 16911433729 |
| 28 | 33822867457 |