login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A028856
as a simple table
n
a(n)
2
2
3
5
4
13
5
63
6
308
7
2045
8
16969
9
183216
10
2567158
11
46749427
[2,5,13,63,308,2045,16969,183216,2567158,46749427]