login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A330297
as a simple table
n
a(n)
0
0
1
0
2
1
3
3
4
24
5
540
6
13320
[0,0,1,3,24,540,13320]