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A031436
as a simple table
n
a(n)
0
1
1
1
2
0
3
0
4
0
5
0
6
0
7
1
8
0
9
1
10
1
11
1
12
3
13
7
14
1
15
119
16
398
17
161925
18
2412890
[1,1,0,0,0,0,0,1,0,1,1,1,3,7,1,119,398,161925, 2412890]