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A102832
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
0
7
3
8
21
9
78
10
302
11
1139
12
4156
13
14791
14
52529
15
183565
16
635691
17
2183533
18
7314869
19
25303217
[0,0,0,0,0,0,3,21,78,302,1139,4156,14791,52529, 183565,635691,2183533,7314869,25303217]