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) |
|---|---|
| 5 | 0 |
| 6 | 48 |
| 7 | 281740 |
| 8 | 6164286 |
| 9 | 36452297 |
| 10 | 137540680 |
| 11 | 403558893 |