login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A133206
as a simple table
n
a(n)
1
1
2
1
3
3
4
7
5
25
6
99
7
690
8
6551
9
133174
10
4138641
11
290045659
[1,1,3,7,25,99,690,6551,133174,4138641,290045659]
