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 | 80 |
| 4 | 1280 |
| 5 | 14320 |
| 6 | 148480 |
| 7 | 1459840 |
| 8 | 13835680 |
| 9 | 127784640 |
| 10 | 1158460000 |
| 11 | 10342876480 |
| 12 | 91312921760 |
| 13 | 798077066720 |
| 14 | 6922857067840 |