login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A000381
as a simple table
n
a(n)
0
2
1
3
2
4
3
6
4
9
5
14
6
22
7
35
8
56
9
90
10
145
11
234
12
378
13
611
14
988
15
1598
16
2585
17
4182
18
6766
[2,3,4,6,9,14,22,35,56,90,145,234,378,611,988, 1598,2585,4182,6766]