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 | 24 |
| 1 | 7200 |
| 2 | 671832 |
| 3 | 42120000 |
| 4 | 2259461784 |
| 5 | 116697218400 |
| 6 | 6145075369464 |
| 7 | 334042684560000 |
| 8 | 18529848376972632 |
| 9 | 1033842723079716000 |
| 10 | 57545200744624079544 |
| 11 | 3188945939520159000000 |
| 12 | 176129265145080634433304 |