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A253201
as a simple table
n
a(n)
1
0
2
1
3
3
4
5
5
6
6
7
7
8
8
10
9
12
10
14
11
17
12
18
13
19
14
20
15
21
16
22
17
23
18
24
19
27
20
29
[0,1,3,5,6,7,8,10,12,14,17,18,19,20,21,22,23,24, 27,29]