login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018256
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
9
7
12
8
18
9
36
[1,2,3,4,6,9,12,18,36]