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 | -2 |
4 | 12 |
5 | 96 |
6 | -220 |
7 | -7440 |
8 | -15624 |
9 | 813120 |
10 | 7340112 |
11 | -104165280 |
12 | -2442773520 |
13 | 8815815360 |
14 | 855578733984 |
15 | 4653629425536 |
16 | -317564443445760 |
17 | -5591544140206080 |
18 | 110965435244017920 |
19 | 4730495445765296640 |
20 | -16883238483957574656 |