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 | 1 |
2 | 1 |
3 | 28 |
4 | 12600 |
5 | 69699849 |
6 | 4070693024640 |
7 | 2484046163254367574 |
8 | 15778915364062895746351104 |
9 | 1040828457711477326843036225608036 |
10 | 711789875509887224494712166194197254144000 |
11 | 5040627715175514814159607456023227379139001458908168 |