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A325936
as a simple table
n
a(n)
1
0
2
0
3
1
4
0
5
1
6
1
7
2
8
2
9
9
10
13
11
37
12
81
13
205
14
512
15
1335
16
3404
17
8922
18
23592
19
62630
20
167622
[0,0,1,0,1,1,2,2,9,13,37,81,205,512,1335,3404, 8922,23592,62630,167622]