n | a(n) |
---|---|
0 | -1 |
1 | -1 |
2 | 0 |
3 | 0 |
4 | 2 |
5 | 10 |
6 | 10 |
7 | 70 |
8 | 42 |
9 | 378 |
10 | 168 |
11 | 1848 |
12 | 660 |
13 | 8580 |
14 | 2574 |
15 | 38610 |
16 | 10010 |
17 | 170170 |
18 | 38896 |
19 | 739024 |
20 | 151164 |
21 | 3174444 |
22 | 587860 |
23 | 13520780 |
24 | 2288132 |
25 | 57203300 |
26 | 8914800 |
27 | 240699600 |
28 | 34767720 |
29 | 1008263880 |
30 | 135727830 |
31 | 4207562730 |
32 | 530365050 |
33 | 17502046650 |
34 | 2074316640 |
[-1,-1,0,0,2,10,10,70,42,378,168,1848,660,8580, 2574,38610,10010,170170,38896,739024,151164, 3174444,587860,13520780,2288132,57203300,8914800, 240699600,34767720,1008263880,135727830, 4207562730,530365050,17502046650,2074316640] |