login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A003304
as a simple table
n
a(n)
2
2
3
8
4
32
5
144
6
708
7
3696
8
20296
9
115624
10
676828
11
4044744
12
24565432
[2,8,32,144,708,3696,20296,115624,676828,4044744, 24565432]