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) |
|---|---|
| 3 | 4 |
| 4 | 20 |
| 5 | 6202 |
| 6 | 3436584 |
| 7 | 77299240 |
| 8 | 617036560 |
| 9 | 3062307644 |
| 10 | 11508925120 |
| 11 | 35920299466 |