login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A100540
as a simple table
n
a(n)
1
1
2
2
3
48
4
36972288
5
52260618977280
[1,2,48,36972288,52260618977280]