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 | 2 |
2 | 24 |
3 | 4320 |
4 | 8910720 |
5 | 17116004505600 |
6 | 170974031122008628879954060917200710847692800 |
7 | 12749472205565550032020636281352368036406720997031277595140988449695952806020854579200000 |