login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A321956
as a simple table
n
a(n)
0
1
1
1
2
0
3
2
4
4
5
0
6
16
7
40
8
0
9
456
10
1759
11
0
12
34636
13
175198
14
0
15
5494621
16
34043062
17
0
[1,1,0,2,4,0,16,40,0,456,1759,0,34636,175198,0, 5494621,34043062,0]