login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A058668
as a simple table
n
a(n)
1
0
2
1
3
2
4
5
5
6
6
13
7
28
[0,1,2,5,6,13,28]