login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A117541
as a simple table
n
a(n)
1
1
2
2
3
6
4
9
5
56
6
23
7
399
8
442
9
2220
10
2386
11
71577
12
22001
13
1179483
14
1156519
15
4975079
[1,2,6,9,56,23,399,442,2220,2386,71577,22001, 1179483,1156519,4975079]