login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A085615
as a simple table
n
a(n)
1
1
2
1
3
2
4
8
5
48
6
352
7
2880
8
25216
9
231168
10
2190848
11
21292032
12
211044352
[1,1,2,8,48,352,2880,25216,231168,2190848, 21292032,211044352]