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 | 0 |
2 | -1 |
3 | 513 |
4 | -532800 |
5 | 1077540500 |
6 | -3831689610000 |
7 | 22051842087895137 |
8 | -192710430555501494272 |
9 | 2433436736207275231050384 |
10 | -42684202683959414242500000000 |
11 | 1007311823853329619224620155226025 |
12 | -31149342348518897782279760206406615040 |