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A076261
as a simple table
n
a(n)
2
4
3
0
4
8
5
0
6
4
7
12
8
0
9
0
10
18
11
14
12
0
13
0
14
10
15
44
16
10
17
0
18
0
19
0
20
50
21
74
22
4
[4,0,8,0,4,12,0,0,18,14,0,0,10,44,10,0,0,0,50,74, 4]