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 | 1 |
1 | 120 |
2 | 7167072 |
3 | 25015771681981520 |
4 | 1251577752496617773723676099629193 |
5 | 655010254318810176195603896415342984711897764371763012689776 |