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 | 0 |
| 3 | 48 |
| 4 | 320 |
| 5 | 5925 |
| 6 | 33936 |
| 7 | 691880 |
| 8 | 5107200 |
| 9 | 69610716 |
| 10 | 628484000 |