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A121151
as a simple table
n
a(n)
1
3
2
4
3
5
4
6
5
7
6
7
7
8
8
9
9
10
10
10
11
11
12
12
13
12
14
13
[3,4,5,6,7,7,8,9,10,10,11,12,12,13]