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 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 64 |
| 5 | 1024 |
| 6 | 32767 |
| 7 | 2096731 |
| 8 | 268232643 |
| 9 | 68572495926 |
| 10 | 35005772219631 |
| 11 | 35642624717803839 |