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) |
---|---|
2 | 4 |
3 | 69360 |
4 | 25181448044544 |
5 | 500282053019322336000000000 |
6 | 1364205042837678184255639132540659302400000000 |
7 | 1119704625219101611411719462621416231171361585800882437615771859939328 |