login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A057578
as a simple table
n
a(n)
0
1
1
1
2
1
3
3
4
9
5
18
6
38
[1,1,1,3,9,18,38]
