login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A286124
as a simple table
n
a(n)
1
0
2
2
3
40
4
1564
5
497400
6
1187052462
[0,2,40,1564,497400,1187052462]