A117405
formatted as a simple table:
n
a(n)
0
4
1
4
2
4
3
9
4
14
5
33
6
65
7
129
8
254
9
511
10
1027
11
2047
12
4097
13
8193
14
16382
15
32765
16
65531
17
131073
18
262142
19
524289
20
1048577
[4,4,4,9,14,33,65,129,254,511,1027,2047,4097,8193, 16382,32765,65531,131073,262142,524289,1048577]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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