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A245569
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
4
6
6
7
11
8
12
9
21
10
28
11
29
12
31
13
51
14
54
15
55
16
57
[0,1,2,3,4,6,11,12,21,28,29,31,51,54,55,57]
