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A066175
as a simple table
n
a(n)
1
1
2
3
3
7
4
15
5
31
6
127
7
1023
8
8191
9
131071
10
524287
11
2147483647
[1,3,7,15,31,127,1023,8191,131071,524287, 2147483647]
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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)