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A256174
as a simple table
n
a(n)
2
4
3
9
4
7
5
20
6
6
7
33
8
13
9
23
10
16
11
62
12
8
13
75
14
18
15
17
16
25
[4,9,7,20,6,33,13,23,16,62,8,75,18,17,25]