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 | 1 |
2 | 1 |
3 | 3 |
4 | 20 |
5 | 1440 |
6 | 126720 |
7 | 106444800 |
8 | 92649553920 |
9 | 800492145868800 |
10 | 169546981039511961600 |
11 | 22908645527719529813114880 |
12 | 98973345879641681792154678067200 |
13 | 1436275858228814897897209896513621196800 |