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 | 177 |
| 4 | 240 |
| 5 | 1255 |
| 6 | 630 |
| 7 | 4487 |
| 8 | 2040 |
| 9 | 12249 |