login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A147638
as a simple table
n
a(n)
1
3
2
7
3
15
4
27
5
63
6
125
7
1701
[3,7,15,27,63,125,1701]