login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A008907
as a simple table
n
a(n)
0
1
1
3
2
12
3
38
4
108
5
174
6
204
7
153
8
57
9
15
[1,3,12,38,108,174,204,153,57,15]