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 | 1 |
2 | 2 |
3 | 720 |
4 | 87178291200 |
5 | 265252859812191058636308480000000 |
6 | 31469973260387937525653122354950764088012280797258232192163168247821107200000000000000 |