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 | 8 |
| 4 | 192 |
| 5 | 5120 |
| 6 | 192000 |
| 7 | 10938368 |
| 8 | 976453632 |
| 9 | 138258022400 |
| 10 | 31176435302400 |
| 11 | 11206367427166208 |
| 12 | 6420240819994755072 |
| 13 | 5860188449655027138560 |
| 14 | 8518797083350691185950720 |
| 15 | 19715227484913090464294371328 |
| 16 | 72618853907514273117149186752512 |