login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A031437
as a simple table
n
a(n)
0
1
1
1
2
1
3
2
4
2
5
2
6
4
7
3
8
4
9
9
10
14
11
33
12
839
13
2041
14
22192
[1,1,1,2,2,2,4,3,4,9,14,33,839,2041,22192]