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A307163
as a simple table
n
a(n)
1
0
2
0
3
0
4
12
5
0
6
9
7
0
8
0
9
0
10
0
11
0
12
0
13
0
14
0
15
0
[0,0,0,12,0,9,0,0,0,0,0,0,0,0,0]