n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 60 |
6 | 360 |
7 | 2016 |
8 | 11088 |
9 | 73872 |
10 | 602640 |
11 | 4411440 |
12 | 81677376 |
13 | 934435008 |
14 | 8100473472 |
15 | 104370819840 |
16 | 1448725616640 |
17 | 15823660179456 |
18 | 247231858514688 |
19 | 3703908371910912 |
20 | 66727356304757760 |
21 | 1124506454958351360 |
22 | 19305439846610835456 |
[0,0,1,3,12,60,360,2016,11088,73872,602640, 4411440,81677376,934435008,8100473472, 104370819840,1448725616640,15823660179456, 247231858514688,3703908371910912, 66727356304757760,1124506454958351360, 19305439846610835456] |