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 | 1 |
2 | 2 |
3 | 90 |
4 | 369600 |
5 | 305540235000 |
6 | 88832646059788350720 |
7 | 14007180988362844601443040716800 |
8 | 1707750599894443404262670865631874246246400000 |
9 | 217425846656446788579638892849417587480505167467321080630000000 |