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A250407
as a simple table
n
a(n)
1
2
2
3
3
5
4
7
5
13
6
61
7
71
8
79
9
157
10
281
11
563
12
1277
13
1777
14
2339
15
6311
16
8233
17
8543
18
11047
19
22907
20
27689
[2,3,5,7,13,61,71,79,157,281,563,1277,1777,2339, 6311,8233,8543,11047,22907,27689]
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Last modified April 19 11:29 EDT 2024. Contains 371791 sequences. (Running on oeis4.)