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 | 2 |
2 | 4 |
3 | -1216 |
4 | 2310400 |
5 | -13094125568 |
6 | 41787366322733056 |
7 | 609452979875950622670848 |
8 | 150142808011575068721319772160000 |
9 | -7129771654003819760990676428837143372103680 |
10 | 114629197516562460020595757143135575237521247385419776 |