login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A147273
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
21
10
41
11
79
12
171
13
645
14
1743
15
5843
16
17953
17
98853
18
402491
19
2708743
20
12396159
[1,1,1,1,1,1,1,1,21,41,79,171,645,1743,5843,17953, 98853,402491,2708743,12396159]