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A204098
as a simple table
n
a(n)
1
4
2
5
3
6
4
8
5
12
6
14
7
16
8
17
9
20
10
21
11
22
12
30
13
31
14
32
15
33
16
35
17
37
18
40
19
41
20
42
[4,5,6,8,12,14,16,17,20,21,22,30,31,32,33,35,37, 40,41,42]