login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A053916
as a simple table
n
a(n)
1
2
2
18
3
482
4
5868
5
20838
6
208188
7
492162
8
6582038
9
2054834162
10
205483392086668
[2,18,482,5868,20838,208188,492162,6582038, 2054834162,205483392086668]