login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A306892
as a simple table
n
a(n)
0
1
1
1
2
2
3
5
4
14
5
50
6
265
7
1601
8
11984
9
101884
[1,1,2,5,14,50,265,1601,11984,101884]