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A147753
as a simple table
n
a(n)
1
0
2
0
3
0
4
1
5
1
6
1
7
1
8
2
9
1
10
1
11
1
12
1
13
1
14
1
15
1
16
2
17
2
18
2
19
2
20
2
[0,0,0,1,1,1,1,2,1,1,1,1,1,1,1,2,2,2,2,2]
