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 | -1400 |
4 | -679140000 |
5 | -122489812645200000 |
6 | -6931927717187904217987200000 |
7 | -114287375178291587421201860354580633600000 |
8 | -527655997339226839875614785993553970321322576128000000000 |
9 | -666218073328701414704702576237379472614149140939534461737723520000000000000 |