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A145804
as a simple table
n
a(n)
1
0
2
0
3
1
4
2
5
2
6
4
7
6
8
7
9
9
10
12
11
13
12
16
13
20
14
22
15
25
16
30
17
32
18
36
[0,0,1,2,2,4,6,7,9,12,13,16,20,22,25,30,32,36]