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A079509
as a simple table
n
a(n)
0
0
1
2
2
5
3
9
4
14
5
20
6
27
7
35
8
44
9
54
10
65
11
77
12
90
13
104
14
119
15
135
16
152
17
170
18
189
[0,2,5,9,14,20,27,35,44,54,65,77,90,104,119,135, 152,170,189]