n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 7 |
5 | 41 |
6 | 260 |
7 | 1930 |
8 | 17463 |
9 | 200008 |
10 | 3026192 |
11 | 62212319 |
12 | 1742874972 |
13 | 65794989216 |
14 | 3314857545154 |
15 | 222226981778153 |
16 | 19858056830333695 |
17 | 2371636836808937036 |
18 | 378993965527624639893 |
[0,0,0,1,7,41,260,1930,17463,200008,3026192, 62212319,1742874972,65794989216,3314857545154, 222226981778153,19858056830333695, 2371636836808937036,378993965527624639893] |