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A307831
as a simple table
n
a(n)
1
2
2
0
3
1
4
0
5
2
6
0
7
0
8
1
9
0
10
1
11
0
12
1
13
3
14
1
15
1
16
0
17
3
18
0
19
0
20
5
[2,0,1,0,2,0,0,1,0,1,0,1,3,1,1,0,3,0,0,5]