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A099404
as a simple table
n
a(n)
1
6
2
4
3
3
4
21
5
2
6
15
7
13
8
12
9
11
10
10
11
9
12
8
13
72
14
7
15
63
16
6
17
56
18
53
19
51
20
5
21
46
22
44
23
42
24
41
25
4
26
38
27
36
[6,4,3,21,2,15,13,12,11,10,9,8,72,7,63,6,56,53,51, 5,46,44,42,41,4,38,36]