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 | 1 |
3 | 0 |
4 | 3 |
5 | 0 |
6 | 15 |
7 | 720 |
8 | 105 |
9 | 25920 |
10 | 945 |
11 | 712800 |
12 | 39927195 |
13 | 18532800 |
14 | 4522138335 |
15 | 486486000 |
16 | 324696683025 |
17 | 20936022307200 |
18 | 19281559579425 |
19 | 5026330152043200 |
20 | 1045172736969075 |
21 | 704618287875216000 |
22 | 51145202778981886575 |
23 | 76432873129004106000 |