login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A003141
as a simple table
n
a(n)
0
0
1
0
2
0
3
1
4
1
5
3
6
4
7
7
8
8
9
12
10
15
11
20
12
22
13
28
[0,0,0,1,1,3,4,7,8,12,15,20,22,28]