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A176837
as a simple table
n
a(n)
1
0
2
0
3
2
4
1
5
4
6
2
7
6
8
5
9
9
10
4
11
8
12
13
13
12
14
6
15
21
16
18
17
14
18
9
19
14
20
28
21
27
[0,0,2,1,4,2,6,5,9,4,8,13,12,6,21,18,14,9,14,28, 27]