login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A180933
as a simple table
n
a(n)
1
3
2
13
3
53
4
222630977
5
3916565571106302349381
[3,13,53,222630977,3916565571106302349381]
