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A003891
as a simple table
n
a(n)
1
1
2
15
3
15
4
30
5
30
6
30
7
30
8
30
9
30
10
30
11
31
12
32
13
32
14
32
15
32
16
32
17
32
18
32
[1,15,15,30,30,30,30,30,30,30,31,32,32,32,32,32, 32,32]