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) |
|---|---|
| 0 | 1 |
| 1 | 32 |
| 2 | 720 |
| 3 | 14400 |
| 4 | 277200 |
| 5 | 5322240 |
| 6 | 103783680 |
| 7 | 2075673600 |
| 8 | 42810768000 |
| 9 | 913296384000 |
| 10 | 20183850086400 |
| 11 | 462393656524800 |
| 12 | 10981849342464000 |
| 13 | 270322445352960000 |
| 14 | 6893222356500480000 |
| 15 | 181981070211612672000 |