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 | 0 |
1 | 15 |
2 | 120 |
3 | 840 |
4 | 5775 |
5 | 39600 |
6 | 271440 |
7 | 1860495 |
8 | 12752040 |
9 | 87403800 |
10 | 599074575 |
11 | 4106118240 |
12 | 28143753120 |
13 | 192900153615 |
14 | 1322157322200 |
15 | 9062201101800 |
16 | 62113250390415 |
17 | 425730551631120 |
18 | 2918000611027440 |
19 | 20000273725560975 |