login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A192843
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
21
7
1640
8
407889
9
76204819
10
26261341398
11
12631545191076
[0,0,0,0,0,21,1640,407889,76204819,26261341398, 12631545191076]