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 | 1 |
2 | 1 |
3 | 3 |
4 | 3 |
5 | 15 |
6 | 33 |
7 | 9061920 |
8 | 1252445414220 |
9 | 126032376305404800 |
10 | 50110448042127911907268800 |
11 | 13399946812028296616282674883512406948355335893125182077721607466200299913000 |