login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A213377
as a simple table
n
a(n)
1
1
2
3
3
20
4
170
5
1728
6
18878
7
214278
8
2488176
9
29356463
[1,3,20,170,1728,18878,214278,2488176,29356463]