login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A321401
as a simple table
n
a(n)
0
1
1
1
2
2
3
4
4
7
5
14
6
29
7
57
8
117
9
240
10
498
[1,1,2,4,7,14,29,57,117,240,498]