login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A181273
as a simple table
n
a(n)
1
2
2
3
3
9
4
58
5
1991
6
177193
7
50841045
8
40797077296
[2,3,9,58,1991,177193,50841045,40797077296]