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 | 0 |
| 2 | 1780 |
| 3 | 73764 |
| 4 | 1655170 |
| 5 | 8174314 |
| 6 | 70304076 |
| 7 | 193687886 |