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A127581 as a simple table

n a(n)
0 2
1 3
2 7
3 23
4 31
5 127
6 127
7 383
8 1279
9 3583
10 5119
11 6143
12 8191
13 73727
14 81919
15 131071
16 131071
17 524287
18 524287
19 14680063
20 14680063
21 14680063
22 109051903
23 109051903
24 654311423
25 738197503
26 738197503
27 2147483647
28 2147483647
29 2147483647

[2,3,7,23,31,127,127,383,1279,3583,5119,6143,8191,
 73727,81919,131071,131071,524287,524287,14680063,
 14680063,14680063,109051903,109051903,654311423,
 738197503,738197503,2147483647,2147483647,
 2147483647]

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Last modified May 23 11:05 EDT 2019. Contains 323513 sequences. (Running on oeis4.)