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 | 3 |
2 | 12 |
3 | 1080 |
4 | 18506880 |
5 | 2198278051200 |
6 | 28657168334177779210174055055360000 |
7 | 30539655646420783598362725995379113771515252254037575464371359842304000000000 |