login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A118990
as a simple table
n
a(n)
1
0
2
4
3
32
4
512
5
15872
6
907008
7
104535552
[0,4,32,512,15872,907008,104535552]