login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A298115
as a simple table
n
a(n)
1
3
2
4
3
12
4
68
5
1569
6
314613
7
2135825375
[3,4,12,68,1569,314613,2135825375]