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 | 56 |
| 4 | 140 |
| 5 | 1440 |
| 6 | 11550 |
| 7 | 351120 |
| 8 | 41580 |
| 9 | 742560 |
| 10 | 29279250 |
| 11 | 8316000 |
| 12 | 72348396120 |
| 13 | 3386892600 |
| 14 | 578918340 |