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 | 0 |
2 | 2 |
3 | 3 |
4 | 56 |
5 | 270 |
6 | 4704 |
7 | 43260 |
8 | 814736 |
9 | 11356632 |
10 | 240848640 |
11 | 4492204200 |
12 | 108396245088 |
13 | 2513538490320 |
14 | 68878522931568 |
15 | 1896787592514360 |
16 | 58622475066067200 |
17 | 1860520458522196800 |
18 | 64297710768900261888 |
19 | 2303738717704104464640 |