n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 36 |
5 | 150 |
6 | 2340 |
7 | 47166 |
8 | 676116 |
9 | 10602150 |
10 | 248197860 |
11 | 6304530606 |
12 | 154511054676 |
13 | 4227889233750 |
14 | 134462460901860 |
15 | 4519745455581726 |
16 | 157756124072317716 |
17 | 5960350758700381830 |
18 | 243292987180534250340 |
19 | 10433760831781705395726 |
20 | 469420864688765414084436 |
[1,0,0,6,36,150,2340,47166,676116,10602150, 248197860,6304530606,154511054676,4227889233750, 134462460901860,4519745455581726, 157756124072317716,5960350758700381830, 243292987180534250340,10433760831781705395726, 469420864688765414084436] |