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) |
---|---|
2 | 6 |
3 | 120 |
4 | 55440 |
5 | 367567200 |
6 | 288807105787200 |
7 | 1970992304700453905270400 |
8 | 46015447651610234928592313897306120347488000 |
9 | 20945137389024582113645213620899991935836129981347124754955196200225728000 |