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 | 810 |
7 | 6174 |
8 | 49560 |
9 | 1439640 |
10 | 22060080 |
11 | 312487560 |
12 | 8687891520 |
13 | 199853503200 |
14 | 4216976539776 |
15 | 126706600944000 |
16 | 3771722349158400 |
17 | 106462579493088000 |
18 | 3626324277349651200 |
19 | 129806833608095575680 |
20 | 4565069619653632320000 |