n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 56 |
5 | 790 |
6 | 8380 |
7 | 76482 |
8 | 638736 |
9 | 5043950 |
10 | 38390660 |
11 | 285007162 |
12 | 2079779416 |
13 | 14995363110 |
14 | 107204473740 |
15 | 761823557042 |
16 | 5390550296096 |
17 | 38026057186270 |
18 | 267656481977620 |
19 | 1881017836414122 |
20 | 13204444871932776 |
21 | 92618543463601430 |
22 | 649270263511862300 |
[0,0,0,2,56,790,8380,76482,638736,5043950, 38390660,285007162,2079779416,14995363110, 107204473740,761823557042,5390550296096, 38026057186270,267656481977620,1881017836414122, 13204444871932776,92618543463601430, 649270263511862300] |