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 | 0 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 140 |
6 | 990 |
7 | 8442 |
8 | 84056 |
9 | 955656 |
10 | 12227130 |
11 | 173812430 |
12 | 2717859012 |
13 | 46362339036 |
14 | 856770362630 |
15 | 17050946225250 |
16 | 363576478312560 |
17 | 8269357341437072 |
18 | 199837364514425586 |
19 | 5113346326011170838 |
20 | 138106722548779770620 |
21 | 3926456810081828991780 |