login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018514
as a simple table
n
a(n)
1
1
2
2
3
5
4
10
5
11
6
22
7
25
8
50
9
55
10
110
11
275
12
550
[1,2,5,10,11,22,25,50,55,110,275,550]