n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 90 |
5 | 2040 |
6 | 67950 |
7 | 3110940 |
8 | 187530840 |
9 | 14398171200 |
10 | 1371785398200 |
11 | 158815387962000 |
12 | 21959547410077200 |
13 | 3574340599104475200 |
14 | 676508133623135814000 |
15 | 147320988741542099484000 |
16 | 36574751938491748341360000 |
17 | 10268902998771351157327104000 |
[1,0,1,6,90,2040,67950,3110940,187530840, 14398171200,1371785398200,158815387962000, 21959547410077200,3574340599104475200, 676508133623135814000,147320988741542099484000, 36574751938491748341360000, 10268902998771351157327104000] |