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A033957
as a simple table
n
a(n)
1
3
2
4
3
6
4
6
5
6
6
6
7
6
8
10
9
8
10
8
11
10
12
6
13
6
14
10
15
12
16
8
17
8
18
10
19
6
20
8
21
10
22
10
23
14
24
12
25
6
26
6
27
6
28
6
29
18
30
18
[3,4,6,6,6,6,6,10,8,8,10,6,6,10,12,8,8,10,6,8,10, 10,14,12,6,6,6,6,18,18]