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A028842 as a simple table

n a(n)
1 2
2 3
3 5
4 7
5 12
6 13
7 15
8 17
9 21
10 31
11 51
12 71
13 112
14 113
15 115
16 117
17 121
18 131
19 151
20 171
21 211
22 311
23 511
24 711
25 1112
26 1113
27 1115
28 1117
29 1121
30 1131
31 1151
32 1171
33 1211
34 1311
35 1511
36 1711
37 2111
38 3111
39 5111
40 7111
41 11112
42 11113
43 11115
44 11117
45 11121
46 11131
47 11151

[2,3,5,7,12,13,15,17,21,31,51,71,112,113,115,117,
 121,131,151,171,211,311,511,711,1112,1113,1115,
 1117,1121,1131,1151,1171,1211,1311,1511,1711,2111,
 3111,5111,7111,11112,11113,11115,11117,11121,
 11131,11151]

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Last modified May 17 19:53 EDT 2024. Contains 372607 sequences. (Running on oeis4.)