login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A002087
as a simple table
n
a(n)
1
1
2
1
3
2
4
3
5
4
6
6
7
16
8
16
9
30
[1,1,2,3,4,6,16,16,30]