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A001265 formatted as a simple table:

n a(n)
0 0
1 1
2 3
3 7
4 3
5 5
6 31
7 3
8 3
9 7
10 127
11 3
12 5
13 17
14 7
15 73
16 3
17 11
18 31
19 23
20 89
21 3
22 3
23 5
24 7
25 13
26 8191
27 3
28 43
29 127
30 7
31 31
32 151
33 3
34 5
35 17
36 257
37 131071
38 3
39 3
40 3
41 7
42 19
43 73
44 524287
45 3
46 5
47 5
48 11
49 31
50 41
51 7
52 7
53 127
54 337
55 3
56 23
57 89
58 683
59 47
60 178481
61 3
62 3
63 5
64 7
65 13
66 17
67 241 

[0,1,3,7,3,5,31,3,3,7,127,3,5,17,7,73,3,11,31,23,
 89,3,3,5,7,13,8191,3,43,127,7,31,151,3,5,17,257,
 131071,3,3,3,7,19,73,524287,3,5,5,11,31,41,7,7,
 127,337,3,23,89,683,47,178481,3,3,5,7,13,17,241]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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