login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A169807
as a simple table
n
a(n)
3
1
4
2
5
4
6
12
7
33
8
102
9
312
10
1006
[1,2,4,12,33,102,312,1006]