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 | 576 |
| 5 | 4752 |
| 6 | 36864 |
| 7 | 271680 |
| 8 | 1931808 |
| 9 | 13384320 |
| 10 | 91133664 |
| 11 | 610863072 |
| 12 | 4051654752 |
| 13 | 26592186336 |
| 14 | 173304754368 |
| 15 | 1121024960064 |