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A288247
as a simple table
n
a(n)
3
3
4
2
5
3
6
8
7
9
8
7
9
9
10
8
11
11
12
12
13
12
14
13
15
14
16
14
17
15
18
16
19
17
20
18
21
19
22
20
23
21
[3,2,3,8,9,7,9,8,11,12,12,13,14,14,15,16,17,18,19, 20,21]