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 | 264 |
| 2 | 1334 |
| 3 | 4108 |
| 4 | 373323 |
| 5 | 6436371 |
| 6 | 387420507 |
| 7 | 1099511627816 |