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A131615
as a simple table
n
a(n)
1
0
2
1
3
2
4
4
5
5
6
8
7
9
8
10
9
12
10
13
11
17
12
21
13
22
14
24
15
26
16
30
17
32
18
33
19
36
20
42
21
46
22
66
23
101
[0,1,2,4,5,8,9,10,12,13,17,21,22,24,26,30,32,33, 36,42,46,66,101]