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A304916
as a simple table
n
a(n)
1
0
2
1
3
2
4
4
5
7
6
11
7
21
8
22
9
28
10
37
11
42
12
52
13
69
14
784
[0,1,2,4,7,11,21,22,28,37,42,52,69,784]