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 | 2 |
2 | -6 |
3 | 28 |
4 | -144 |
5 | 736 |
6 | -3512 |
7 | 14896 |
8 | -61600 |
9 | 509632 |
10 | -12903296 |
11 | 422568704 |
12 | -17796848640 |
13 | 824388274176 |
14 | -43343785743488 |
15 | 2375499099860224 |
16 | -140774447935008256 |
17 | 8727751762659943424 |
18 | -578377033389467758592 |
19 | 40230774454685666598912 |
20 | -2967831511563656631672832 |
21 | 229648123356288830870929408 |