login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A006404
as a simple table
n
a(n)
3
1
4
1
5
2
6
5
7
10
8
29
9
96
10
339
11
1320
12
5473
[1,1,2,5,10,29,96,339,1320,5473]