login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A079731
as a simple table
n
a(n)
0
28
1
55
2
110
3
220
4
440
5
880
6
1760
7
3520
[28,55,110,220,440,880,1760,3520]