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A047334
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
5
6
6
7
7
8
8
9
9
10
10
11
12
12
13
13
14
14
15
15
16
16
17
17
19
18
20
19
21
20
22
21
23
22
24
23
26
24
27
25
28
26
29
[0,1,2,3,5,6,7,8,9,10,12,13,14,15,16,17,19,20,21, 22,23,24,26,27,28,29]