login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A147072
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
1
10
1
11
1
12
1
13
1
14
1
15
3
16
3
17
9
18
9
19
19
20
19
21
61
22
61
23
211
24
211
25
741
26
741
27
3813
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,3,9,9,19,19,61,61, 211,211,741,741,3813]