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A028865 formatted as a simple table:

n a(n)
1 2
2 3
3 5
4 7
5 13
6 17
7 37
8 67
9 83
10 107
11 167
12 337
13 367
14 383
15 587
16 1667
17 166667
18 333337
19 333367
20 333667
21 336667
22 666667
23 33333667
24 33666667
25 66666667 

[2,3,5,7,13,17,37,67,83,107,167,337,367,383,587,
 1667,166667,333337,333367,333667,336667,666667,
 33333667,33666667,66666667]

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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