n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 24 |
5 | 60 |
6 | 120 |
7 | 210 |
8 | 20496 |
9 | 181944 |
10 | 1059120 |
11 | 4990590 |
12 | 100458600 |
13 | 1634594676 |
14 | 18436740504 |
15 | 164378216730 |
16 | 2124284725920 |
17 | 38171412643440 |
18 | 631390188466656 |
19 | 8760417873485814 |
20 | 124649582165430840 |
21 | 2167585391936047020 |
22 | 41833303600025220360 |
[1,0,0,0,24,60,120,210,20496,181944,1059120, 4990590,100458600,1634594676,18436740504, 164378216730,2124284725920,38171412643440, 631390188466656,8760417873485814, 124649582165430840,2167585391936047020, 41833303600025220360] |