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 | 2 |
| 2 | 5 |
| 3 | 17 |
| 4 | 1025 |
| 5 | 16385 |
| 6 | 65537 |
| 7 | 268435457 |
| 8 | 288230376151711745 |
| 9 | 77371252455336267181195265 |
| 10 | 20282409603651670423947251286017 |
| 11 | 21267647932558653966460912964485513217 |