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 | 6 |
| 2 | 204 |
| 3 | 17174 |
| 4 | 3831324 |
| 5 | 2220901926 |
| 6 | 3366668183708 |
| 7 | 13330538464876654 |
| 8 | 137936054886331468840 |
| 9 | 3729575155642883493035294 |