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A347473
as a simple table
n
a(n)
3
0
4
2
5
4
6
9
7
15
8
21
9
31
10
39
11
51
12
63
13
76
14
90
15
104
16
127
[0,2,4,9,15,21,31,39,51,63,76,90,104,127]
