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 | 2 |
1 | -120 |
2 | 30240 |
3 | -17297280 |
4 | 17643225600 |
5 | -28158588057600 |
6 | 64764752532480000 |
7 | -202843204931727360000 |
8 | 830034394580628357120000 |
9 | -4299578163927654889881600000 |
10 | 27500101936481280675682713600000 |