login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A146404
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
5
6
25
7
63
8
357
9
1891
10
12499
11
113287
12
1385821
13
19264611
14
381162993
15
8433132619
[1,1,1,1,5,25,63,357,1891,12499,113287,1385821, 19264611,381162993,8433132619]