n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 36 |
5 | 150 |
6 | 3780 |
7 | 77406 |
8 | 1059156 |
9 | 21669990 |
10 | 640319940 |
11 | 16622025486 |
12 | 450085011156 |
13 | 15416323450710 |
14 | 561938117029380 |
15 | 20587443165165246 |
16 | 835816881563118036 |
17 | 37282225483118856390 |
18 | 1722621978491064495300 |
19 | 83817942806509377794286 |
[1,0,0,6,36,150,3780,77406,1059156,21669990, 640319940,16622025486,450085011156,15416323450710, 561938117029380,20587443165165246, 835816881563118036,37282225483118856390, 1722621978491064495300,83817942806509377794286] |