login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A356519
as a simple table
n
a(n)
1
3
2
45
3
2835
4
42525
5
1403325
6
273648375
[3,45,2835,42525,1403325,273648375]