login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A057575
as a simple table
n
a(n)
0
1
1
2
2
4
3
6
4
12
5
22
6
38
7
72
8
144
9
288
[1,2,4,6,12,22,38,72,144,288]