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 | 16 |
| 3 | 288 |
| 4 | 7200 |
| 5 | 604800 |
| 6 | 46569600 |
| 7 | 1816214400 |
| 8 | 92626934400 |
| 9 | 5573053886400 |
| 10 | 445257673660800 |
| 11 | 11738611396512000 |
| 12 | 1734575477357923200 |
| 13 | 98737373326527936000 |
| 14 | 8491414106081402496000 |
| 15 | 1697221394453020323888000 |
| 16 | 372257225850029124372768000 |