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 | 3 |
| 3 | 77 |
| 4 | 4667 |
| 5 | 1138331 |
| 6 | 906385523 |
| 7 | 2441756629583 |
| 8 | 22050004579190301 |
| 9 | 670548945799312331099 |