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 | 720 |
2 | 28740096000 |
3 | 601322989968949248000000 |
4 | 30722158107023001697205508762501120000000000 |
5 | 12389984031943899068723274670059592852478855603111854080000000000000000 |