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 | 3 |
| 2 | 5 |
| 3 | 17 |
| 4 | 65 |
| 5 | 4097 |
| 6 | 65537 |
| 7 | 262145 |
| 8 | 1073741825 |
| 9 | 1152921504606846977 |
| 10 | 309485009821345068724781057 |
| 11 | 81129638414606681695789005144065 |
| 12 | 85070591730234615865843651857942052865 |