login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A067216
as a simple table
n
a(n)
0
1
1
9
2
81
3
18081
4
264639729
5
239657412990669
6
14022194613733384575957
7
55099298574634623527360069025765
[1,9,81,18081,264639729,239657412990669, 14022194613733384575957, 55099298574634623527360069025765]