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 | 1 |
3 | 2 |
4 | 18 |
5 | 792 |
6 | 209880 |
7 | 389117520 |
8 | 5771780174160 |
9 | 770509566129663360 |
10 | 1028600220910021528728960 |
11 | 15104551945968674840127424147200 |
12 | 2661646219535110627933754465838408595200 |