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 | 2 |
2 | 270 |
3 | 74692800 |
4 | 419731620267960000 |
5 | 252716802910471719823692648960000 |
6 | 59736659298524125157504488525739821430187940800000000 |
7 | 16079377413231597423103950774423398920424350187193326745026311068057600000000000 |