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 | 4 |
3 | 120 |
4 | 33600 |
5 | 18446400 |
6 | 18361728000 |
7 | 30199104936000 |
8 | 76326119565696000 |
9 | 280889824362219072000 |
10 | 1443428429045578335360000 |
11 | 10016498030869925136622080000 |
12 | 91330153089556497015273454080000 |