login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A339806
as a simple table
n
a(n)
1
1
2
2
3
3
4
7
5
43
6
239
7
1663
8
9242
9
47523
10
351115
11
2015403
12
4026914
13
10143015
14
72872619
15
144151023
16
413384223
[1,2,3,7,43,239,1663,9242,47523,351115,2015403, 4026914,10143015,72872619,144151023,413384223]