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A079435
as a simple table
n
a(n)
1
0
2
4
3
6
4
20
5
35
6
52
7
59
8
77
9
78
10
86
11
89
12
99
13
122
14
127
[0,4,6,20,35,52,59,77,78,86,89,99,122,127]