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A031975 as a simple table

n a(n)
1 1
2 2
3 3
4 5
5 6
6 7
7 8
8 10
9 11
10 11
11 13
12 14
13 15
14 16
15 17
16 19
17 21
18 22
19 23
20 24
21 26
22 27
23 29
24 30
25 31
26 33
27 34
28 35
29 37
30 38
31 39
32 41
33 42
34 43
35 45
36 47
37 48
38 50
39 53

[1,2,3,5,6,7,8,10,11,11,13,14,15,16,17,19,21,22,
 23,24,26,27,29,30,31,33,34,35,37,38,39,41,42,43,
 45,47,48,50,53]

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Last modified April 18 14:46 EDT 2021. Contains 343089 sequences. (Running on oeis4.)