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A139205
as a simple table
n
a(n)
1
5
2
6
3
7
4
11
5
13
6
17
7
28
8
81
9
87
10
433
11
640
12
647
13
798
14
1026
15
1216
16
1277
17
3825
18
6684
[5,6,7,11,13,17,28,81,87,433,640,647,798,1026, 1216,1277,3825,6684]
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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)