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 | 48 |
| 4 | 1152 |
| 5 | 30720 |
| 6 | 1152000 |
| 7 | 65630208 |
| 8 | 5858721792 |
| 9 | 829548134400 |
| 10 | 187058611814400 |
| 11 | 67238204562997248 |
| 12 | 38521444919968530432 |
| 13 | 35161130697930162831360 |
| 14 | 51112782500104147115704320 |
| 15 | 118291364909478542785766227968 |
| 16 | 435713123445085638702895120515072 |
| 17 | 2553666760604861879125023961330483200 |