login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A195642
as a simple table
n
a(n)
1
1
2
1
3
3
4
19
5
391
6
25532
7
5539434
8
4116036800
9
10694128575819
10
98630958757213465
11
3267417937114919996252
[1,1,3,19,391,25532,5539434,4116036800, 10694128575819,98630958757213465, 3267417937114919996252]