login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018628
as a simple table
n
a(n)
1
1
2
2
3
13
4
26
5
29
6
58
7
377
8
754
[1,2,13,26,29,58,377,754]