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The On-Line Encyclopedia of Integer Sequences
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A202103
as a simple table
n
a(n)
1
0
2
0
3
2
4
2
5
4
6
4
7
4
8
6
9
6
10
8
11
8
12
10
[0,0,2,2,4,4,4,6,6,8,8,10]