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 | 0 |
2 | 0 |
3 | 3 |
4 | 6 |
5 | 20 |
6 | 360 |
7 | 2394 |
8 | 17220 |
9 | 252720 |
10 | 2963520 |
11 | 34525260 |
12 | 552027960 |
13 | 8860952880 |
14 | 142907532768 |
15 | 2682870913800 |
16 | 53297669552400 |
17 | 1086135012144000 |
18 | 24087251436249600 |
19 | 566843973576536880 |
20 | 13834256829134364000 |
21 | 357412359616922433600 |
22 | 9723652519748883408000 |