login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A057909
as a simple table
n
a(n)
1
1
2
3
3
9
4
15
5
37
6
85
7
133
8
225
9
1233
10
12793
11
108889
[1,3,9,15,37,85,133,225,1233,12793,108889]