login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A072552
as a simple table
n
a(n)
6
1
7
0
8
1
9
1
10
3
11
3
12
13
13
21
14
68
15
166
16
543
17
1605
18
5413
19
17735
20
61084
21
210221
22
736287
[1,0,1,1,3,3,13,21,68,166,543,1605,5413,17735, 61084,210221,736287]