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 | 6 |
4 | 30 |
5 | 150 |
6 | 900 |
7 | 6300 |
8 | 52920 |
9 | 516600 |
10 | 5166000 |
11 | 56826000 |
12 | 689396400 |
13 | 9135126000 |
14 | 127891764000 |
15 | 1918376460000 |
16 | 32083427376000 |
17 | 547888316976000 |
18 | 9941031356256000 |
19 | 188879595768864000 |
20 | 3817981890122400000 |
21 | 80266319244951840000 |
22 | 1769328161437636800000 |