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 | 15 |
4 | -240 |
5 | 6420 |
6 | -249120 |
7 | 12729360 |
8 | -799249920 |
9 | 59539354560 |
10 | -5472506188800 |
11 | 708462047462400 |
12 | -129547455170918400 |
13 | 24363744478955481600 |
14 | -2357904494544779980800 |
15 | -506327043021030975744000 |