login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A220343
as a simple table
n
a(n)
1
0
2
0
3
7
4
114
5
1794
6
24605
[0,0,7,114,1794,24605]