login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018763
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
16
6
31
7
32
8
62
9
124
10
248
11
496
12
992
[1,2,4,8,16,31,32,62,124,248,496,992]