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A028771
as a simple table
n
a(n)
1
2
2
3
3
8
4
10
5
11
6
12
7
14
8
15
9
17
10
18
11
19
12
21
13
26
14
27
15
31
16
32
17
37
18
39
19
40
20
41
21
43
22
44
23
46
24
47
25
48
26
50
27
55
28
56
[2,3,8,10,11,12,14,15,17,18,19,21,26,27,31,32,37, 39,40,41,43,44,46,47,48,50,55,56]
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Last modified April 25 16:23 EDT 2024. Contains 371989 sequences. (Running on oeis4.)