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A131616
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
10
10
11
11
12
12
13
13
15
14
18
15
23
16
32
17
35
18
42
19
55
20
104
[0,1,2,3,4,5,6,7,10,11,12,13,15,18,23,32,35,42,55, 104]