login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A003097
as a simple table
n
a(n)
2
1
3
3
4
7
5
20
6
52
7
157
8
458
9
1436
10
4531
11
14794
12
48944
13
165314
[1,3,7,20,52,157,458,1436,4531,14794,48944,165314]