login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A030256
as a simple table
n
a(n)
0
0
1
0
2
0
3
13
4
540
5
232767
[0,0,0,13,540,232767]