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 | 0 |
1 | 1 |
2 | 2 |
3 | -2 |
4 | 8 |
5 | 24 |
6 | -2240 |
7 | 59600 |
8 | -640000 |
9 | -35477120 |
10 | 2287843200 |
11 | -337824000 |
12 | -8328489693696 |
13 | 320219485774848 |
14 | 53149588906171392 |
15 | -5832590252624818176 |
16 | -534898113615540043776 |
17 | 142559169839206640025600 |
18 | 6582786304965587026329600 |