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A176538
as a simple table
n
a(n)
1
0
2
0
3
1
4
1
5
2
6
2
7
3
8
4
9
5
10
8
11
10
12
17
13
26
14
43
15
90
[0,0,1,1,2,2,3,4,5,8,10,17,26,43,90]