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 | 0 |
2 | 1819380158564160 |
3 | 117124856755987405647781716823680 |
4 | 7540058082713667504003446125203741470945194284480 |
5 | 485400601250164750241979240919394389707542655611270208094258863360 |