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A078507
as a simple table
n
a(n)
0
0
1
4
2
5
3
9
4
12
5
17
6
21
7
29
8
32
9
39
10
49
11
52
12
58
13
73
14
76
15
88
16
92
17
109
18
117
19
125
20
140
21
151
22
159
[0,4,5,9,12,17,21,29,32,39,49,52,58,73,76,88,92, 109,117,125,140,151,159]