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A036686
as a simple table
n
a(n)
0
3
1
6
2
9
3
12
4
15
5
18
6
21
7
24
8
27
9
30
10
33
11
36
12
39
13
42
14
45
15
50
16
94
[3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,50,94]