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 | 1 |
2 | 4 |
3 | 18 |
4 | 204 |
5 | 1260 |
6 | 37440 |
7 | 299880 |
8 | 11002320 |
9 | 204860880 |
10 | 6618628800 |
11 | 92924647200 |
12 | 8181137764800 |
13 | 124123075876800 |
14 | 7211104918617600 |
15 | 288085376346768000 |
16 | 14964000305173920000 |
17 | 340302035937191328000 |
18 | 42619767305209750656000 |