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 | 21 |
| 2 | 17955 |
| 3 | 46999008 |
| 4 | 791256327456 |
| 5 | 93090977154967365 |
| 6 | 76664422757447240352147 |
| 7 | 441955140976608911501601763200 |
| 8 | 17834484070599672226059360780631862400 |