login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A051915
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
5
6
12
7
18
8
35
9
51
10
53
11
78
12
209
13
396
14
4166
15
9091
16
9587
17
13357
18
15917
19
17652
20
46127
[0,1,2,3,5,12,18,35,51,53,78,209,396,4166,9091, 9587,13357,15917,17652,46127]