login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A109799
as a simple table
n
a(n)
1
2
2
3
3
5
4
7
5
13
6
17
7
19
8
31
9
61
10
127
[2,3,5,7,13,17,19,31,61,127]