login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018452
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
8
7
9
8
12
9
16
10
18
11
24
12
27
13
36
14
48
15
54
16
72
17
108
18
144
19
216
20
432
[1,2,3,4,6,8,9,12,16,18,24,27,36,48,54,72,108,144, 216,432]