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 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 64 |
| 7 | 128 |
| 8 | 256 |
| 9 | 512 |
| 10 | 1023 |
| 11 | 2043 |
| 12 | 4079 |
| 13 | 8143 |
| 14 | 16255 |
| 15 | 32447 |
| 16 | 64767 |
| 17 | 129279 |
| 18 | 258047 |
| 19 | 515072 |
| 20 | 1028102 |
| 21 | 2052126 |
| 22 | 4096110 |
| 23 | 8175966 |
| 24 | 16319486 |
| 25 | 32574206 |
| 26 | 65019134 |
| 27 | 129780222 |
| 28 | 259045373 |
| 29 | 517062645 |
| 30 | 1032073165 |
| 31 | 2060050221 |
| 32 | 4111924477 |
| 33 | 8207529469 |