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 | 1 |
1 | 4 |
2 | 72 |
3 | 21600 |
4 | 190512000 |
5 | 580909190400000 |
6 | 428616352408083840000000 |
7 | 859278392084450410309036800000000000 |
8 | 2097197194438629126172451944256706311040000000000000 |