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 | 20 |
3 | 1296 |
4 | 616896 |
5 | 2294480000 |
6 | 68803020000000 |
7 | 16921170978243840000 |
8 | 34496793424028349312532480 |
9 | 587395062985562798532990766497792 |
10 | 84034508984208959408391703340160000000000 |
11 | 101510206136861741998326287566434701976960000000000 |