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A035238
as a simple table
n
a(n)
1
1
2
3
3
4
4
7
5
9
6
12
7
13
8
16
9
19
10
21
11
25
12
27
13
28
14
31
15
36
16
37
17
39
18
43
19
48
20
49
21
52
22
57
23
61
24
63
25
64
[1,3,4,7,9,12,13,16,19,21,25,27,28,31,36,37,39,43, 48,49,52,57,61,63,64]