login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A124674
as a simple table
n
a(n)
1
2
2
3
3
5
4
7
5
23
6
37
7
53
8
73
9
257
10
523
11
2357
12
2753
13
3257
14
3527
15
5237
16
5273
17
7253
18
7523
[2,3,5,7,23,37,53,73,257,523,2357,2753,3257,3527, 5237,5273,7253,7523]