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) |
---|---|
1 | -1 |
2 | 2 |
3 | -12 |
4 | 120 |
5 | -1680 |
6 | 30360 |
7 | -672000 |
8 | 17599680 |
9 | -532224000 |
10 | 18248902560 |
11 | -699544581120 |
12 | 29645099003520 |
13 | -1376154991411200 |
14 | 69445751181206400 |
15 | -3785191236642816000 |
16 | 221613328121888102400 |
17 | -13870531255760776396800 |
18 | 924194452386724174656000 |