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A048893
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
8
10
9
11
10
12
6
13
12
14
13
15
14
16
15
17
16
18
15
19
18
20
11
21
20
22
21
23
22
[0,1,2,3,4,5,6,7,8,9,10,6,12,13,14,15,16,15,18,11, 20,21,22]