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A100991
as a simple table
n
a(n)
1
0
2
1
3
3
4
4
5
7
6
8
7
9
8
11
9
12
10
13
11
16
12
17
13
19
14
21
15
23
16
24
17
25
18
27
19
28
20
29
21
31
22
32
23
33
24
36
25
37
26
39
[0,1,3,4,7,8,9,11,12,13,16,17,19,21,23,24,25,27, 28,29,31,32,33,36,37,39]