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A058986
as a simple table
n
a(n)
1
0
2
1
3
3
4
4
5
5
6
7
7
8
8
9
9
10
10
11
11
13
12
14
13
15
14
16
15
17
16
18
17
19
18
20
19
22
[0,1,3,4,5,7,8,9,10,11,13,14,15,16,17,18,19,20,22]