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) |
|---|---|
| 2 | 0 |
| 3 | 78 |
| 4 | 2915 |
| 5 | 413255 |
| 6 | 27664684 |
| 7 | 443065607 |
| 8 | 3534941139 |
| 9 | 18915573187 |
| 10 | 78095787882 |
| 11 | 268541796601 |