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 | 0 |
| 2 | 18 |
| 3 | 65 |
| 4 | 66 |
| 5 | 257 |
| 6 | 1025 |
| 7 | 1039 |
| 8 | 1050 |
| 9 | 4097 |
| 10 | 16385 |
| 11 | 16386 |
| 12 | 16399 |
| 13 | 16447 |
| 14 | 65537 |
| 15 | 65551 |
| 16 | 65898 |
| 17 | 262145 |
| 18 | 262146 |
| 19 | 262207 |
| 20 | 262239 |
| 21 | 262399 |
| 22 | 1048577 |
| 23 | 1048578 |
| 24 | 1048591 |
| 25 | 1048639 |
| 26 | 4194305 |
| 27 | 4194310 |
| 28 | 4194319 |
| 29 | 4194399 |
| 30 | 4194559 |
| 31 | 4194687 |
| 32 | 4195327 |