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 | 1024 |
| 11 | 2048 |
| 12 | 4096 |
| 13 | 8192 |
| 14 | 16384 |
| 15 | 32767 |
| 16 | 65519 |
| 17 | 130918 |
| 18 | 261156 |
| 19 | 519252 |
| 20 | 1026876 |
| 21 | 2014992 |
| 22 | 3913704 |
| 23 | 7507638 |
| 24 | 14198086 |
| 25 | 26434916 |
| 26 | 48412432 |
| 27 | 87167164 |
| 28 | 154276028 |
| 29 | 268435456 |
| 30 | 459312152 |
| 31 | 773201629 |
| 32 | 1281220733 |
| 33 | 2091005866 |