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 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 40320 |
| 9 | 14398171200 |
| 10 | 8302816499443200 |
| 11 | 7722015017013984456000 |
| 12 | 11649337108041078980732943360 |
| 13 | 28278447454165011203551734584421120 |
| 14 | 108738182111446498614705217754614976371200 |