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A049066
as a simple table
n
a(n)
1
0
2
2
3
4
4
6
5
6
6
8
7
12
8
12
9
12
10
14
11
14
12
18
13
18
14
18
15
18
16
18
17
20
18
20
[0,2,4,6,6,8,12,12,12,14,14,18,18,18,18,18,20,20]