n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 12 |
5 | 6 |
6 | 30 |
7 | 150 |
8 | 210 |
9 | 210 |
10 | 210 |
11 | 30030 |
12 | 13860 |
13 | 60060 |
14 | 420420 |
15 | 4144140 |
16 | 9699690 |
17 | 87297210 |
18 | 717777060 |
19 | 4180566390 |
20 | 18846497670 |
21 | 26004868890 |
[0,1,2,12,6,30,150,210,210,210,30030,13860,60060, 420420,4144140,9699690,87297210,717777060, 4180566390,18846497670,26004868890] |