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 | 1 |
| 2 | 7 |
| 3 | 112 |
| 4 | 2800 |
| 5 | 95200 |
| 6 | 4093600 |
| 7 | 212867200 |
| 8 | 12984899200 |
| 9 | 908942944000 |
| 10 | 71806492576000 |
| 11 | 6318971346688000 |
| 12 | 612940220628736000 |
| 13 | 64971663386646016000 |
| 14 | 7471741289464291840000 |
| 15 | 926495919893572188160000 |
| 16 | 123223957345845101025280000 |
| 17 | 17497801943110004345589760000 |