login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A132997
as a simple table
n
a(n)
1
1
2
2
3
7
4
14
5
73
6
146
7
511
8
1022
9
293339
10
586678
11
2053373
12
4106746
13
21413747
14
42827494
15
149896229
16
299792458
[1,2,7,14,73,146,511,1022,293339,586678,2053373, 4106746,21413747,42827494,149896229,299792458]