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A155123
as a simple table
n
a(n)
0
1
1
2
2
2
3
2
4
0
5
4
6
4
7
0
8
-4
9
8
10
12
11
0
12
8
13
-32
14
8
15
48
[1,2,2,2,0,4,4,0,-4,8,12,0,8,-32,8,48]
