login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A143106
as a simple table
n
a(n)
0
1
1
3
2
5
3
9
4
17
5
21
[1,3,5,9,17,21]
