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 | 2 |
2 | 5 |
3 | 3 |
4 | 20 |
5 | 570 |
6 | 341400 |
7 | 116758458000 |
8 | 13632577445813641200000 |
9 | 185847167817698504752014113195034069600000000 |
10 | 34539169785859790805229099212216829464451540660176789302662465332580254227520000000000000 |